For IEC use only
29/844/RM
2014-04-18
®
INTERNATIONAL ELECTROTECHNICAL COMMISSION
TECHNICAL COMMITTEE NO. 29
ELECTROACOUSTICS
Unconfirmed minutes of the meeting
held in Pretoria, South Africa
on 2014-02-17 and 2014-02-21
PRESENT:
Chairperson:
Ms Susan Dowson, United Kingdom
Secretariat:
Mr Leif Nielsen, Denmark
Ms Liselotte Sørensen, Denmark (assistant secretary)
Delegates
P-members:
CANADA
Mr Peter Hanes
DENMARK
Mr Gert Ravn
Mr Hans-Otto Bindeballe
Mr Johan Gramtorp
Mr Søren Jønsson
Mr Frank Marek
Mr Ulrik Mehr
Mr Mikkel Nilsson
Mr Erling Sandermann Olsen
FRANCE
Mr Dominique Rodrigues
GERMANY
Mr Thomas Fedtke
Mr Ingolf Bork
Mr Anton Gebert
Mr Thomas Groß
Mr Dietmar Lommel
Mr Reimar Rohweder
JAPAN
Mr Ryuzo Horiuchi
Mr You-ichi Fujisaka
Mr Masaharu Ohya
Mr Makoto Tateno
NORWAY
Mr Ole-Herman Bjor
Mr Einar Laukli
SOUTH AFRICA
Mr Riaan Nel
Ms Willa Breed
Mr Sekwanele Kubeka
Mr Gorden Motaung
Mr Jobulani Nhlapo
-2UNITED KINGDOM
USA
Mr Richard Tyler
Mr Richard Barham
Mr Graham Frost
Mr David Preves (first session)
Mr Chad M. Walber (second session)
Mr Kenneth Cox
Mr Rufus Leroy Grason
Mr Richard Stein
O-members:
BRAZIL
Mr Zemar M.D. Soares *
P-members not present:
Australia
Austria
China
Czech Republic
Finland
India
Italy
Netherlands
Poland
Romania
Russian Federation
Spain
Sweden
Switzerland
Liaison committees:
OIML/TC 13
Mr Thomas Fedtke
ISO/TC 43 & SC 1
Mr Leif Nielsen
ISO/TC 108/SC 3
Mr Leif Nielsen
* not formally confirmed by NC
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CONTENTS
SCHEDULE OF MEETINGS .............................................................................................................................. 6
1
OPENING OF THE MEETING AND ROLL CALL OF DELEGATES ......................................................6
2
APPROVAL OF THE DRAFT AGENDA ...................................................................................................... 6
3
NOTE OF THE MINUTES FROM THE IEC/TC 29 MEETING, 2012-09-17/21
IN CHARLOTTENLUND, DENMARK...................................................................................................... 7
4
REPORT OF THE SECRETARIAT ............................................................................................................... 6
4.1
Review of the programme of work ................................................................................................................. 7
4.2
Information from the IEC/CO.......................................................................................................................... 8
5
REPORTS FROM WORKING GROUPS/MAINTENANCE TEAMS .......................................................8
5.1
MT 4 – Sound level meters ...................................................................................................................... 8
IEC 61252 revision ....................................................................................................................................... 8
DECISION: To register revision as a PWI with Phil Battenberg, USA, as project leader.
5.2
WG 5 – Measurement microphones ......................................................................................................... 9
CD 61094-3 .................................................................................................................................................. 9
DECISION: To be proceeded with as a second CD for a 2 months commenting period.
IEC 61094-4 revision ..................................................................................................................................... 9
DECISION: To register revision as a PWI with Richard Barham, UK, as project leader
IEC 61094-5 revision ..................................................................................................................................... 9
DECISION: To be registered for revision and to be proceeded with as a first CD together with
a Review Report.
5.3
WG 10 – Audiometric equipment ...........................................................................................................10
Convenorship .........................................................................................................................................10
DECISION: To appoint Erik Nielsen, Denmark, as new convenor
IEC 60645-1 and IEC 60645-2 revisions ...............................................................................................10
DECISION: To register an amalgamated revision as PWIs with Rufus Grason, USA, as
project leader.
DECISION: Amalgamated revision to be proceeded with as a first CD together with Review
Reports.
IEC 60645-6 and IEC 60645-7 revision..................................................................................................11
DECISION: To be registered for revision and to be proceeded with as a first CDs together with
Review Reports.
5.4
WG 13 – Hearing aids ............................................................................................................................11
CDV 60118-0 ..........................................................................................................................................11
DECISION: To be proceeded with as FDIS.
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Revision of IEC 60118-2 Amendment 2 .................................................................................................11
DECISION: To register revision as a PWI with Gert Ravn, Denmark, as project leader.
DECISION: To circulate a first CD together with a Review Report to activate the item when
the text for a CD has been prepared.
CDV 60118-13 .......................................................................................................................................12
DECISION: To be proceeded with as FDIS.
First CD 61669 .......................................................................................................................................12
DECISION: To be proceeded with as CDV.
NP 62866 ................................................................................................................................................12
DECISION: To be proceeded with as DTS.
IEC 60601-2-66 revision .........................................................................................................................12
DECISION: To be registered for revision and to be proceed with as a CDV together with a
Review Report.
5.5
MT 17 – Sound calibrators .....................................................................................................................13
IEC 60942 revision ................................................................................................................................13
DECISION: To register revision as a PWI with Susan Dowson, UK, as project leader
DECISION: To circulate a first CD together with a Review Report to activate the item when
the text for a CD has been prepared.
5.6
MT 18 – Amendments for relevant IEC/TC 29 standards with respect to developments on IEC ..........13
5.7
MT 19 – Revision of IEC 61260, Filters..................................................................................................13
First CD 61260-2 ....................................................................................................................................14
DECISION: To proceed with as CDV
First CD 61260-3 ....................................................................................................................................14
DECISION: To proceed with as CDV
5.8
MT 20 – Revision of IEC 60118-4 ..........................................................................................................14
5.9
WG 21 – Head and ear simulators .........................................................................................................14
CDV 60318-3 ..........................................................................................................................................14
DECISION: To be proceeded with for direct publication.
IEC/TS 60318-7 revision ........................................................................................................................14
DECISION: To register revision as a PWI with Utz Richter, Germany, as project leader.
DECISION: To circulate a first CD together with a Review Report to activate the item when
the text for a CD has been prepared.
New IEC 60318-X ...................................................................................................................................15
DECISION: To register preparation of a of a guide IEC 60318-X as a PWI with Richard
Barham, UK, as project leader.
5.10 WG 22 – Audio-frequency induction-loop systems and equipment for assisted hearing.......................15
5.11 MT 23 – Revision of IEC 61265:1995 ....................................................................................................15
DECISION: To initiate a call for convenor.
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6
PRESENTATION OF PROPOSALS FOR NEW WORK ITEMS ...........................................................16
7
DISBANDING OF WORKING GROUPS ...............................................................................................16
8
STRATEGIC BUSINESS PLAN ............................................................................................................16
DECISION: SBP approved.
9
STABILITY DATES ................................................................................................................................17
DECISION: Stability Dates approved.
10
EDITING COMMITTEE ................................................................................................................................ 17
11
ANY OTHER BUSINESS ............................................................................................................................ 17
12
NEXT MEETING........................................................................................................................................... 17
13
CLOSING OF THE MEETING ..................................................................................................................... 18
ANNEX A – Secretariat's report .......................................................................................................................... 19
ANNEX B – Liaison report from IEC/TC 87 ........................................................................................................ 28
ANNEX C – Information from the IEC/CO ......................................................................................................... 29
ANNEX D – Day Report of MT 4........................................................................................................................... 32
ANNEX E – Day Report of WG 5.......................................................................................................................... 34
ANNEX F – Day Report of WG 10 ........................................................................................................................ 38
ANNEX G – Day Report of WG 13 ....................................................................................................................... 40
ANNEX H – Day Report of MT 17 ........................................................................................................................ 44
ANNEX I – Day Report of MT 19 .......................................................................................................................... 46
ANNEX J –Report of MT 20 .................................................................................................................................. 48
ANNEX K – Day Report of WG 21 ....................................................................................................................... 49
ANNEX L –Report of WG 22................................................................................................................................. 51
ANNEX M – Strategic Business Plan.................................................................................................................. 52
ANNEX O – Stability dates ................................................................................................................................... 57
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SCHEDULE OF MEETINGS
The following groups met in the period 2014-02-17/21 in Pretoria, South Africa:
MT 4
WG 5
WG 10
WG 13
MT 17
MT 19
WG 21
1
Sound level meters
Measurement microphones
Audiometric equipment
Hearing aids
Sound calibrators
Revision of IEC 61260, Filters
Head and ear simulators
OPENING OF THE MEETING AND ROLL CALL OF DELEGATES
Opening
The meeting was opened by the chairman, Sue Dowson, UK. She first introduced Paul Johnson, secretary for
the South African National Committee. In welcoming the delegates to Pretoria on behalf of SABS, Paul
introduced the assistant secretary for the meeting arrangement, Crystal Gradwell, and provided some practical
information. He expressed his best wishes for a successful week of meetings.
The chairman expressed her sincere thanks to SABS for the invitation and in particular to Paul Johnson and
Crystal Gradwell for their excellent and helpful assistance to the secretariat in the setting up and in preparing for
the meetings.
The chairman went on to say that, sadly, as most delegates were aware, Alan Marsh – former convenor of
MT 4 – had passed away in December. She recalled that over the years Alan had made many contributions to
standardisation, through many groups of TC 29, where notably for many years he was convenor of MT 4
(former WG 4). Alan was very well respected, very knowledgeable of measurements in the aircraft industry
and of instrumentation in general. Alan had a special ability to motivate and make everyone feel they were
part of the working group, and his inclusive and friendly manner gave everyone the opportunity to give their
views. At the same time, though, he was always keen to gain consensus and ensure that the documents
progressed. She felt sure that everyone would have their own fond memories of Alan and she had personally
learnt much from him.
A minute’s silence was observed in Alan’s memory.
Roll call
The chairman appreciated the high participation at this meeting – around 50 delegates – despite the current
economic times and many apologies from regular attendees. Also an apology from the technical officer for
TC 29 at the IEC Central Office, Pierre Sebellin, was noted.
The preliminary list of delegates was distributed. The chairman made the roll call of delegates. Representatives
from ISO/TC 43 "Acoustics" and OIML were also registered.
Apologies from the Czech Republic, Italy, Russian Federation, Spain and Sweden were noted.
The final list of delegates is given at the start of this report.
2
APPROVAL OF THE DRAFT AGENDA
The first draft agenda for the meeting, doc. 29/832/DA had been circulated by the IEC Central Office in
November 2013. Three weeks prior to the meetings the IEC Central Office had, as usual, further prepared a zip
file that contained a linked draft agenda with all available documents, doc. 29/832A/DA.
A revised draft agenda was tabled at the meeting and is included in this report with addition of decisions.
Compared to the previous draft agenda, the reference document for the voting result on FDIS 61260-1 had been
added as well as the compilation of comments on CD 61260-2 and CD 61260-3 under items 5.7.1, 5.7.2 and
5.7.3 respectively. Also, a number of administrative 'green' documents prepared immediately before the meeting
had been included.
The revised draft agenda was approved with no changes or additions.
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NOTE OF THE MINUTES FROM THE IEC/TC 29 MEETING HELD IN CHARLOTTENLUND,
DENMARK 2012-09-17/21, doc. 29/795/RM
The unconfirmed minutes from the last meeting, doc 29/795/RM, had been circulated in October 2012 and
approved without corrections.
4
REPORT OF THE SECRETARIAT
4.1
Review of the programme of work
A condensed programme of work and status prepared by the IEC Central Office was given in doc. 29/838/PW.
The chairman reminded the meeting that the programme of work can also be seen as a webpage on the IEC
home page for TC 29.
The secretary briefly presented his more detailed report given in Annex A (updated after the meeting), which
showed the progress of work since the last meeting and the present status of work. Two NCs, Mexico and
Singapore, had downgraded their participation from O-member to non-member so that there were now 24 Pmembers and 11 O-members. 11 WGs/MTs exist under TC 29. Since the last meeting five standards had
been published – which is above the average for all IEC/TCs and SCs for 2013 – and 16 draft documents at
various levels had been circulated. The secretariat report also contained a listing of all work items with their
complete document history in order of WGs/MTs as well as a list of all of the published standards under the
responsibility of TC 29.
The opportunity was taken to thank all participants, notably convenors and project leaders, for their efforts and
devotion – often in their leisure time – to fulfil the ever increasing demands of IEC for fast progress and
improved quality.
The chairman informed the delegates that TC 29 has been aiming to re-inforce links with other appropriate
liaison committees, including IEC/TC 87, Ultrasonics, and the chairman of TC 87 had submitted a liaison
report, which was given in Annex B.
The secretariat also took the opportunity to inform the committee that the management of Danish Standards,
which for more than 40 years has also conducted the international secretariats of ISO/TC 43 "Acoustics" and
ISO/TC 43/SC 1 "Noise" in very close cooperation and coordination with the IEC/TC 29 secretariat, run by the
same secretariat staff, had decided in December 2013 to announce the relinquishment of these ISO
secretariats. According to the rules, Danish Standards is obliged to continue to conduct the secretariats until a
successor has been found, but for a maximum of 12 months.
The chairman then congratulated two people from TC 29 who had received the IEC 1906 Award in 2013. The
aim of this Award is to recognize current achievement(s) that can be considered as a major contribution to
furthering the interests of electrotechnology standardization and related activities. It had been awarded to:
1)
Einar Laukli, Norway, for his participation in preparation of standards for audiometric equipment,
since 1993 as a member of WG 10 and since 2003 as convenor. Under his convenorship the
IEC 60645 series of standards has been developed and maintained. As a professor in clinical
medicine Einar's great knowledge and experience in clinical practice, together with his exceptional
technical understanding, has enabled him to build an effective bridge between technicians and
audiologists. Together with Einar's convenorship of the corresponding ISO/TC 43/WG 1 on audiology,
this has formed the basis for an exceptionally successful cooperation in the development of
coordinated standards for both audiometric equipment and its application in audiology. Throughout
this work Einar has always been very efficient and reliable in co-operating with the secretariat, for
which they are very grateful.
2)
Victor Nedzelnitsky, USA, for his participation in the preparation of standards, since 1981. His main
contributions have been to WG 5 on microphones, but he has also supported WG 17 on the sound
calibrators. Victor always aimed to ensure that the documents produced were clear and unambiguous,
so providing ease and consistency of use. His attention to detail, together with his ability to suggest
appropriate wording, as well as his early adoption of free-field standards, has been notable in the
successful production of the IEC 61094 series of standards.
The committee applauded Einar Laukli on his award, and the chairman asked the US delegation to convey
their congratulations to Victor Nedzelnitsky on behalf of TC 29.
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4.2
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Information from the IEC Central Office
In the absence of the technical officer of the IEC Central Office for TC 29, Pierre Sebellin, the secretariat
presented, on his behalf, the main items of a presentation, given in Annex C, which he had prepared for the
TC 29 meeting.
The following points were highlighted:
•
•
•
The IEC Chairmen terms of office shall be limited to an initial term of a maximum of 6 years,
followed by a single extension of a maximum of 3 years;
A new IEC template functional with all versions of WORD from 2002 and onwards is available;
New updated IEC Website.
A representative from the IEC IT support department, TISS, had recently paid a visit to Danish Standards, and
the secretariat particularly appreciated that their basic intent and efforts are to make things simple and easy to
use for all participants. The member and meeting registration systems and the possibility of adapting the
personal 'My IEC' to individual needs are good examples.
5
REPORTS FROM WORKING GROUPS/MAINTENANCE TEAMS
The secretary reminded the meeting that only the National Committees can register members of working groups
via the IEC Expert Management System. Neither the IEC Central Office nor the TC secretary can make changes.
Further, members were reminded that it is their own responsibility to correct their own data, so the secretary
asked all delegates to be sure to update their data in the Expert Management System. He also reminded the
convenors to use the correct and updated list of members, which can be extracted from the Expert
Management System. Convenors receive automatic notifications when changes are made to the system.
5.1
MT 4 – Sound level meters
MT 4 met in Pretoria. The report is given in Annex D.
With the publication of IEC 61672-1, IEC 61672-2 and IEC 61672-3 on sound level meters in September 2013
there were formally no active items under the responsibility of MT 4. The convenor, Peter Hanes, Canada,
informed the meeting that MT 4 would start to observe the implementation and application of the IEC 61672
series. There was a concern that the uncertainties given in IEC/TS 61094-7 for the values of the differences
between free-field and pressure sensitivity levels of laboratory standard microphones form a significant part of
the uncertainties in the measurement of the frequency weighting of sound level meters and WG 5 was asked
to review the uncertainty data.
• Revision of IEC 61252:2002 "Specifications for personal sound exposure meters"
With regard to the revision of IEC 61252, Sound exposure meters, unfortunately the current project leader,
Phil Battenberg, had not been able to attend the meeting in Pretoria. The convenor hoped that it would be
possible to establish a first WD to be circulated to MT 4 for comments before the next meeting.
In order to make sure that all future tasks are reflected in the programe of work, it was decided to
consistently register all potential revision projects as preliminary work items. Thus, TC 29 took the following
DECISION:
To register the revision of IEC 61252 as a preliminary work item with Phil Battenberg,
USA, as project leader.
It was recognized that for this project it would not be necessary to conduct a review enquiry among the
national committees prior to the establishment of a first draft.
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• Impact of new technologies
Johan Gramtorp had led an ad-hoc group to consider the impact of new technologies including digital
detectors and microphones with integrated preamplifiers on standards for sound level meters. The MT had,
therefore, discussed the findings of the group and the capabilities of existing test equipment and the urgent
issues for standards and strategies for their mitigation.
In addition, there is a concern that the increasing prevalence of applications for handheld devices that claim to
measure sound pressure levels, but whose performance is untested, may cause a reduction in the use of
appropriate standardised instruments, unless users are made aware of the shortcomings of the handheld
devices.
5.2
WG 5 – Measurement microphones
WG 5 met in Pretoria. The report is given in Annex E.
The secretariat had organized the setting up of an internet conference tool for participation in the meeting for
members, who could not be present in Pretoria.
Three documents were under processing by WG 5:
• First CD 61094-3 "Electroacoustics – Measurement microphones – Part 3: Primary method for free field
calibration of laboratory standard microphones by the reciprocity technique"
A first CD had been circulated for comments by 2012-07-27. At the last TC 29 meeting it had been decided
to prepare a revised text before the end of February 2013. However, since the circulation of the first CD,
new issues concerning the ground shield configuration had been under investigation. This had caused a
delay, and it had been necessary to ask for extension of the target date.
The convenor, Richard Barham, UK, reported that solutions had now been found to these problems. TC 29,
therefore, took the following
DECISION:
To proceed with CD 61094-3 as a second CD for a two months commenting period.
WG 5 to prepare the revised text to be submitted to the secretariat by the end of April
2014.
• Revision of IEC 61094-4:1995 "Electroacoustics – Measurement microphones – Part 4: Specifications for
working standard microphones"
After circulation of a Document for Comments, doc. 29/774/DC, to explore the need for revision of
IEC 61094-4, it was decided at the last meeting to await progress in WG 5.
The convenor explained that there is a growing list of developments requiring an extention in scope thus
no immediate development of a Working Draft was foreseen at the moment. For consistency, TC 29 took
the following
DECISION:
To register revision of IEC 61094-4 as a preliminary work item with Richard Barham,
UK, as project leader.
• Revision of IEC 61094-5:2001 "Measurement microphones – Part 5: Methods for pressure calibration of
working standard microphones by comparison"
Based on the result of a Document for Comments, which had been circulated for comments before the last
TC 29 meeting, it had been decided at the last TC 29 meeting to initiate a revision of IEC 61094-5, and that
WG 5 should prepare a CD before the end of 2012. This had not happened, and the convenor admitted
that the intent at the last meeting had been too optimistic.
A Working Draft had, however, been circulated to the members of WG 5 for comments before the meeting
in Pretoria, and as most of the comments related to editorial and minor technical issues, the convenor
announced that a final document could be produced immediately after the meeting in Pretoria. TC 29 took
the following
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DECISION:
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To circulate a first CD 61094-5 together with a Review Report as already decided at
the last meeting. WG 5 to prepare the revised text to be sent to the secretariat by the
end of March 2014.
Finally, an informal discussion of free-field to pressure sensitivity level differences for laboratory standard
microphones and IEC/TS 61094-7 had taken place, see item 5 of the WG 5 report.
5.3
WG 10 – Audiometric equipment
WG 10 met in Pretoria. The report is given in Annex F.
•
Convenorship
The convenor, Einar Laukli, Norway, announced that he wanted to step down as convenor, and he had
proposed to WG 10 that Erik Nielsen, Denmark, should take over. This recommendation was supported by
the working group, and TC 29, therefore, took the following
DECISION:
To appoint Erik Nielsen, Denmark, as convenor of WG 10.
On behalf of the committee the chairman expressed her thanks to Einar Laukli for his contribution, not least
as liaison through his participation in the closely related work of ISO/TC 43 on audiometry.
•
Amalgamated revision of IEC 60645-1:2012 "Electroacoustics – Audiometric equipment – Part 1:
Equipment for pure-tone audiometry and IEC 60645-2:1993 "Electroacoustics – Audiometers – Part 2:
Equipment for speech audiometry"
There were no documents on the TC 29 agenda under the responsibility of WG 10. Einar Laukli explained,
however, that WG 10 is working on a revision of IEC 60645-1 – which had at the last revision been merged
with the former IEC 60645-4 on extended high-frequency audiometry – to also include IEC 60645-2 on
speech audiometry, with the ultimate intent of having only one complete audiometer standard.
Prior to the meeting in Pretoria the project leader, Rufus Grason, had prepared a first working draft entitled
"Electroacoustics – Audiometric equipment – Part 1: Equipment for pure-tone and speech audiometry",
which had been carefully discussed. Further communication would be conducted in the working group, and
Einar Laukli expected that this would lead to the finalization of a text for CD circulation before the end of
the year. TC 29, therefore, took the following
DECISION:
To circulate a first CD 60645-1 together with Review Reports for the revision of
IEC 60645-1 and IEC 60645-2. WG 10 to prepare the revised text to be sent to the
secretariat by the end of 2014.
Further, with reference to the general decision concerning the registration of future revision of standards as
preliminary work items (see item 5.1), TC 29 took the following
DECISION:
To register an amalgamated revision of IEC 60645-1 and IEC 60645-2 as preliminary
work items with Rufus Grason, USA, as project leader.
The secretary took the opportunity to explain that the present IEC 60645-1, which had been published in
2012, had never been implemented by CENELEC as a European standard because discussions with
CEN/CENELEC consultants had taken time and had never been completed with a new consultant, who
had different ideas, taking over from one who had retired.
The convenor noted that the standards of TC 29 were generally being prepared with the aim to serve the
manufacturers and users in the international community in this area and not with the prime purpose of
fulfilling the legal requirements of EU and CENELEC. This sometimes created a problem.
The secretary mentioned that actually all of the CEN/CENELEC consultants had stopped all work at the
moment due to problems with their contracts. It was thus not likely that the present edition of IEC 60645-1
would be formally implemented as a European standard until the next revision was finalized.
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Revisions of IEC 60645-6:2009 "Electroacoustics – Audiometric equipment – Part 6: Instruments for the
measurement of otoacoustic emissions" and IEC 60645-7:2009 "Electroacoustics – Audiometric equipment
– Part 6: Instruments for the measurement of otoacoustic emissions"
Einar Laukli further informed the meeting that WG 10 is also working on a revision of IEC 60645-6 and
IEC 60645-7 (already registered as preliminary work items), for which Erik Nielsen is the project leader,
notably with the purpose of making them suitable for implementation in connection with the European
Medical Devices Directive. TC 29 took the following
DECISION:
•
To register revision of IEC 60645-6 and IEC 60645-7 as active work items. WG 10 to
prepare CDs to be circulated together with Review Reports.
Revision of IEC 60645-3:2007 "Electroacoustics – Audiometric equipment – Part 3: Test signals of short
duration"
Finally, Einar Laukli mentioned that WG 10 also discussed a possible revision of IEC 60645-3 (test signals
of short duration) which at the last meeting had been registered as a preliminary work item with Thomas
Fedtke as project leader. The intention is to include i.a. new stimulus types and reference signals. No
progress had, however, been made towards preparation of a first working draft, and development would
have to be awaited.
5.4
WG 13 – Hearing aids
WG 13 met in Pretoria, The report is given in Annex G.
In view of the broad interest from a great number of members in the many aspects of hearing aids being under
processing in WG 13, the secretariat had organized the setting up of an internet conference tool so that
members, who had not been able to come to South Africa, had been able to participate remotely.
The convenor, Gert Ravn, Denmark, explained that WG 13 had an intermediate meeting in September 2013 in
Denmark and also met in Pretoria to continue discussions on the four documents, which were on the agenda
under the responsibility of WG 13:
• CDV 60118-0 "Electroacoustics – Hearing aids – Part 0: Measurement of the performance characteristics
of hearing aids" (Amalgamated revision of IEC 60118-0, IEC 60118-1, IEC 60118-2, IEC 60118-6)
CDV 60118-0 had been circulated for voting by 2013-09-06. After discussion at the intermediate meeting a
revised draft been prepared by the project leader, Marcel Vlaming, and discussed at the meeting in
Pretoria. Gert Ravn announced that an FDIS could be finalized by the end of May. TC 29, therefore, took
the following
DECISION:
To proceed with CDV 60118-0 as FDIS. WG 13 to prepare the revised text to be
submitted to the secretariat by the end of May 2014.
During the finalization it had been realized that the present Amendment 2 to IEC 60118-2 is specifying the
use of a steady state broadband signal and should actually be maintained. IEC 60118-2 Amendment 2
should, therefore, not be withdrawn but should be the subject of a separate revision of IEC 60118-2. On
this basis TC 29 took the following
DECISION:
For consistency to register revision of IEC 60118-2 Amendment 2 as a preliminary
work item with Gert Ravn, Denmark, as project leader.
DECISION:
To circulate a Review Report to formally activate the work item when the text for a CD
has been prepared by WG 13. Estimated date September 2014.
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• CDV 60118-13 "Electroacoustics – Hearing aids – Part 13: Electromagnetic compatibility (EMC)"
CDV 60118-13 had been circulated for voting by 2013-09-06. After discussion at the intermediate meeting
a revised draft had been prepared by the convenor and discussed at the meeting in Pretoria. The convenor
expected that an FDIS could be sent to the secretariat before the end of May after finalization by the
working group. TC 29, therefore, took the following
DECISION:
To proceed with CDV 60118-13 as FDIS. WG 13 to prepare the revised text to be
submitted to the secretariat by the end of May 2014.
• First CD 61669 "Electroacoustics – Measurement of real-ear acoustical performance characteristics of
hearing aids"
A first CD 61669 had been circulated for comments by 2013-07-12. The convenor regretted that the project
leader, Bill Cole, could not be present in Pretoria. He had, however, prepared both a very careful list of
suggested actions on the comments and a revised draft, which were discussed at the meeting in Pretoria.
The convenor announced that a CDV would be prepared soon after the meeting. On this basis TC 29 took
the following
DECISION:
To proceed with CD 61669 as CDV. WG 13 to prepare the revised text to be submitted
to the secretariat by the end of May 2014.
• NP 62866 "Hearing aids – Method for measuring the electroacoustic performance up to 16 kHz"
A NWIP had been circulated for voting by 2013-07-19 together with a first draft and approved. The
convenor explained that this document had also been considered at the intermediate meeting, and a
revised draft prepared by the project leader, Anton Gebert, was discussed at the meeting in Pretoria.
There had been very much attention and e-mail activity right up to the meeting in Pretoria concerning the
specification and application of this new device. The intention was to prepare a Technical Specification and
to collect experience and data on the basis of that before a future update to standard. As a result of the
meeting the convenor confirmed that a DTS could be prepared soon after the meeting in Pretoria. TC 29,
therefore, took the following
DECISION:
To proceed with NP 62866 as DTS. WG 13 to prepare the revised text to be submitted
to the secretariat by the end of May 2014.
In reply to a question from the German delegation the secretariat confirmed that a standard – when
implemented as European standard – could be related to two (or more) European directives.
• Revision of IEC 60601-2-66:2012 "Medical electrical equipment – Part 2-66: Particular requirements for the
basic safety and essential performance of hearing instruments and hearing instrument systems"
Finally, the convenor mentioned that a first Working Draft for a revision of IEC 60601-2-66 had been
prepared by the project leader Clemens Meythaler and was discussed at the meeting in Pretoria.
The revisions proposed by the project leader had the clear purpose to make the document as suitable as
possible as a basis for European regulation. The proposals were very specific and had been readily
supported by the working group. It was, therefore, recommended to proceed directly with a CDV to be
prepared by the project leader after finalization in WG 13 before the end of May. TC 29 took the following
DECISION:
To revise IEC 60601-2-66. WG 13 to prepare a CDV to be circulated together with a
Review Report in order to formally register the revision as an active work item.
Upon request from the US delegation the secretariat was asked to convey a message of dissatisfaction with
the lack of progress of the work due to the CEN/CENELEC consultants' situation as explained under WG 10,
which would also have implications for standards under preparation in WG 13 (as well as in WG 10). This was
supported by the meeting.
Finally, Gert Ravn mentioned that WG 13 would, again, have an intermediate meeting on 2 February 2015 in
Copenhagen.
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5.5
29/844/RM
MT 17 – Sound calibrators
MT 17 met in Pretoria, Annex H refers.
• Revision of IEC 60942:2003 "Sound calibrators"
The convenor, Sue Dowson, UK, informed the meeting that MT 17 is working on the revision of IEC 60942
to create a new Edition 4. Comments on the current edition of IEC 60942 were discussed and observations
agreed at the last meeting, and these had now been incorporated into a new first WD. Also the changes
required due to the new TC 29 uncertainty policy had been included.
The convenor had also circulated the MT on two key points raised for discussion – whether the ‘C’
designation (i.e. permitting the use of corrections for some or all environmental conditions) be removed for
class 1 and class 2 sound calibrators, and if retained whether a barometer should be supplied with the
calibrator.
These items had also been very carefully discussed by MT 17 at its meeting in Pretoria. The further
production of a revised Working Draft for review by the maintenance team by correspondence would be
necessary, but the convenor expected that this would lead to the preparation of a first CD to be circulated
for comments for discussion at the next MT 17 meeting. TC 29 took the following
DECISION:
For consistency to register revision of IEC 60942 as a preliminary work item allocated
to MT 17 with Sue Dowson, UK, as project leader.
DECISION:
To circulate a Review Report to formally activate the work item when the text for a CD
has been prepared by MT 17.
The MT finally noted that the use of the IEC Collaboration Tools was not particularly easy.
5.6
MT 18 – Amendments of relevant IEC/TC 29 standards with respect to developments on EMC
The chairman informed the meeting that as for earlier meetings MT 18 had no active tasks in preparing
specific standards. However, the convenor, Richard Tyler, UK, reported that he was being kept updated with
the latest standards on EMC and had recently assisted MT 4 and MT 19 with regard to EMC requirements in
the drafts on sound level meters and filters.
He further explained that discussion had taken place within MT 4, at the request of a member, as to whether
the use of cheap equipment operating in the 27 MHz range was decreasing, and if so it might therefore be
possible to drop testing in this frequency range for several types of devices. He would, however, continue
investigations before taking any specific action, and would circulate all members of the MT to obtain their
views.
There might also be need for assistance with regard to the future revision of IEC 61652, IEC 61260-2 and
IEC 61260-3 and possibly also IEC 60942, but this would await the development in the respective MTs.
5.7
MT 19 – Revision of IEC 61260, Filters
MT 19 met in Pretoria, Annex I refers.
The chairman recalled that it was the original intention to develop all three parts of the IEC 61260 series at the
same time, which, however, failed so part 1 was progressed first. Then the intention was that the CDV for part
1 and CDs for part 2 and part 3 should be circulated together, but unfortunately, this also turned out to be
impossible, and at the last MT 19 meeting only the CDV for part 1 had been prepared.
It was, therefore, suggested to ask IEC for a derogation of the rules so that it could be allowed to circulate a
second CDV of part 1, which could then come out together with CDs for part 2 and part 3. This was at first
accepted, and the second CDV was even sent to IEC and acknowledged, but then this procedure was
suddenly stopped by the IEC Central Office.
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29/844/RM
Since part 1 had been numerically approved at the CDV level, the Central Office stated that the next step had
to be the FDIS. Fortunately, it was possible at least to have all three parts circulated at the same time, so after
all, they were all on the agenda but at different stages:
• FDIS 61260-1 "Electroacoustics – Octave-band and fractional-octave-band filters – Part 1: Specifications"
FDIS 61260-1 had been circulated for voting by 2014-01-31 and approved, and IEC 61260-1 had been
published on 2014-02-14.
The convenor, Ole-Herman Bjor, Norway, regretted the negative vote from the UK.
• CD 61260-2 "Electroacoustics – Octave-band and fractional-octave-band filters – Part 2: Pattern evaluation
tests"
and
• CD 61260-3 "Electroacoustics – Octave-band and fractional-octave-band filters – Part 3: Periodic tests"
CD 61260-2 and CD 61260-3 had been circulated for comments by 2014-01-31. The convenor explained
that as result of the consideration of the comments at the meeting in Pretoria, he expected that texts for
CDVs could be sent to the secretariat by the end of May after final consultation in MT 19.
It was the hope that after completion of the basic discussions, CDV 61260-2 and CDV 61260-3 could
proceed without negative votes so that possibly the FDIS voting could be skipped and the year of the final
publications could become 2014 as for IEC 61260-1. With this background TC 29 took the following
DECISION:
5.8
To proceed with CD 61260-2 and CD 61260-3 as CDVs. MT 19 to prepare the revised
texts to be submitted to the secretariat by the end of May 2014.
MT 20 – Revision of IEC 60118-4, Induction loop systems
MT 20 did not meet in Pretoria. A written report by the convenor, Conny Andersson, Sweden, is given in
Annex J.
5.9
WG 21 – Head and ear simulators
WG 21 met in Pretoria, Annex K refers.
Two active items were under processing in WG 21:
• CDV 60318-3 "Electroacoustics – Simulators of human head and ear – Part 3: Acoustic coupler for the
calibration of supra-aural earphones used in audiometry"
CDV 60318-3 had been circulated for voting by 2013-04-12 and approved with no negative votes. The
convenor, Thomas Fedtke, Germany, informed the meeting that the comments had been discussed at the
meeting in Pretoria, and since there were no negative votes WG 21 recommended to proceed directly for
publication. The convenor expected to provide the revised text before the end of May. TC 29 took the
following
DECISION:
To proceed with CDV 60318-3 for direct publication. WG 21 to prepare the revised text
to be submitted to the secretariat by the end of May 2014.
• DC IEC/TS 60318-7 "Electroacoustics – Simulators of human head and ear – Part 7: Head and torso
simulator for the measurement of hearing aids" (Revision of IEC/TS 60318-7:2011)
At the last TC 29 meeting it was decided to initiate revision of IEC/TS 60318-7. The project leader, Utz
Richter, had been working hard with the main manufacturers of these devices to develop a document but
there was still an outstanding issue with the 3D CAD specifications, which should be given in a normative
Annex E, and which were still under preparation.
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29/844/RM
Since it had not been possible to prepare a full CD, a Document for Comments had been circulated for
replies by 2014-01-17, and the convenor explained that the comments had been discussed at the WG 21
meeting in Pretoria. The project leader could not be present at the meeting, however, as for WG 5 and
WG 13 the secretariat had provided for attendance by electronic means, which had permitted him to
participate in the discussion.
The convenor explained that all comments had been resolved during the meeting, and as result he
expected a first CD for a Technical Specification, following completion by the working group could be sent
to the secretariat before the end of August. TC 29 took the following
DECISION:
For consistency to register revision of IEC/TS 60318-7 as a preliminary work item
allocated to WG 21 with Utz Richter, Germany, as project leader.
DECISION:
To circulate a Review Report to formally activate the work item when the text for a CD
has been prepared by WG 21.
• IEC 60318-X "Electroacoustics – Simulators of human head and ear – Part X: Guide to the intended use of
ear simulators"
The convenor also mentioned that WG 21 had considered the development of a guide for the use of the
standards in the IEC 60318-series, possibly in cooperation with WG 13. A Working Draft had been
considered at the meeting in Pretoria, and it had been decided to circulate it for review by specialists in the
different application fields. A revised document would then be circulated within the WG, and as a result, he
expected that it would be possible to prepare the text for a CD by the end of September 2014. TC 29 took
the following
DECISION:
To register the preparation of a guide IEC 60318-X "Electroacoustics – Simulators of
human head and ear – Part X: Guide to the intended use of ear simulators" as a
preliminary work item with Richard Barham, UK, as project leader.
The chairman noted that in order to activate the item, a formal NWIP would be necessary. The UK
delegation undertook to be the proposer and to put forward the NWIP when the document was ready.
5.10
WG 22 – Audio-frequency induction-loop systems and equipment for assisted hearing
WG 22 did not meet in Pretoria. A written report by the convenor, John Woodgate, UK, is given in Annex L.
5.11
MT 23 – Revision of IEC 61265:1995 "Instruments for measurement of aircraft noise –
Performance requirements for systems to measure one-third-octave-band sound pressure levels
in noise certification of transport-category aeroplanes"
MT 23 did not meet in Pretoria.
The chairman recalled that on the initiative of USA at the TC 29 meeting 2008 in Sweden, MT 23 was set up
to revise IEC 61265, and Alan Marsh, USA, was appointed convenor. However, there has been no activity at
all in this group, and MT 23 was not scheduled to meet in Pretoria either, and with the passing of Alan Marsh
this proposed work needed to be reviewed.
The secretariat had, therefore, consulted different sources, which have confirmed that there certainly is a need
to revise IEC 61265, which technically is completely outdated. The French member of MT 23 had been asked
if he would take over as convenor of MT 23, but he did not feel that he had the necessary time and resources
so he had unfortunately declined.
After unofficial consultations it seemed that there are no other obvious potential convenors in the present
membership. No further suggestions emanated from the meetings in Pretoria so TC 29 took the following
DECISION:
To accept the proposal from the IEC Central Office to initiate a call for convenor of
MT 23 to the National Committees, although it was not easy to see how such a process
could lead to the emergence of a qualified convenor.
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29/844/RM
PRESENTATION OF PROPOSALS FOR NEW WORK ITEMS
No written proposals for new items had been received by the secretariat prior to the meeting.
There were no further proposals for new work other than those already dealt with during the review of the
working group/maintenance team activities.
7
DISBANDING OF WORKING GROUPS/MAINTENANCE TEAMS
All groups were active.
8
STRATEGIC BUSINESS PLAN (SBP)
No comments were made during the meeting by any WGs/MTs on the Strategic Business Plan (SBP) for
TC 29 approved at the last meeting, given in 29/795/RM.
The chairman and the secretary had during the meeting prepared an updated SBP, which was presented. The
following changes were proposed:
D.2, Item 1: Updated wording.
Former D.2: Item 4 deleted, see below.
E, Action plan:
E.1 Stability dates
Updated wording.
See also agenda item 9 below.
E.2 New technologies or market requirements
Editorially updated text.
This entry requested WGs/MTs to include in their agendas discussion on new technologies or market
requirements, which were likely to impact the work of the committee. Apart from what has already been reported
under the various working groups and maintenance teams no new proposals were put forward for immediate
action.
E.3 Guidance documents
Wording updated as consequence of the development since the last meeting.
This entry called for the preparation of a guidance document with an example on TC 29 implementation of
inclusion of uncertainties of measurement in TC 29 documents.
TC 29 decided at its last meeting to publish an updated version of the draft prepared at the meeting. As a
result, the final policy on measurement uncertainty and conformance assessment was published in May 2013
as doc. 29/810/INF. The guidance document had been completed and published internally to all convenors
and project leaders.
The chairman explained that this was planned to be the first of a series of guidance notes to be written when
required to help new convenors/project leaders. No requests for any new guidance documents had been
received at this time.
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29/844/RM
Former E.4 Setting up of a secretariat website
Deleted.
The secretariat explained that a website had actually been set up as part of a common website for all of the
ISO and IEC international acoustical secretariats at Danish Standards, however, the content had never been
completed. Since Danish Standards had now decided to relinquish the secretariats of ISO/TC 43 and
ISO/TC 43/SC 1, the website would not be developed and maintained. However, the IEC website had been
much improved and now contained complete information about TC 29 as well as all other IEC/TCs. It was
therefore recognized that no separate website for TC 29 was necessary, and it was decided to delete this
entry in the SBP.
New E.4 Awareness of new and revised standards
Introduction of a new action point to invite all participants to raise awareness of new and revised standards
through internationally and nationally available channels such as professional bodies, conferences and journal
papers.
On the basis of the above, TC 29 took the following
DECISION:
To approve the Strategic Business Plan as amended.
The approved Strategic Business Plan is given in Annex M.
9
STABILITY DATES
The secretariat informed the meeting that IEC had updated the maintenance rules. Generally in future before
taking decisions to revise a standard P-members will be invited to make comments on it as the basis for the
decision. However, if it is clear to the committee that a standard needs to be revised, the decision to revise it
can be taken straight away.
In accordance with item E.1 of the SBP the secretariat had prepared the list of stability dates. The list was
updated with the recommendations of the Working Groups, the Maintenance Teams and the secretariat.
TC 29 took the following
DECISION:
To approve the proposed stability dates with amendments as agreed at the meeting.
The updated list of Stability Dates is given in Annex N.
10
EDITING COMMITTEE
The UK member of the editing committee was Asghar Ashrafi, BSI, with the arrangement that he would
contact appropriate experts in the UK from case to case.
The chairman mentioned that Michel Lecollinet, France, who for many years has edited TC 29 standards prior
to publication in the French language, had retired. She appreciated the outstanding job he had done and on
behalf of the committee she asked the French delegation to convey their sincere thanks to Michel Lecollinet.
The appointment by UTE of a new member for the French language was awaited.
The German National Committee also receives the documents for editing check because of the European
implementation, and also here there has been a replacement. The chairman likewise asked the German
delegation to convey their thanks to the formerly responsible Henryk Sieradzki.
11
ANY OTHER BUSINESS
None.
12
NEXT MEETING
There was no formal invitation for the next meeting, which was scheduled for the second part of 2015.
The chairman said that it would be nice to have a long range meeting schedule, and she invited all NCs to
consider the possibility of inviting TC 29 for future meetings.
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29/844/RM
CLOSING OF THE MEETING
The chairman expressed her sincere thanks to the convenors and delegates for their efficient work and to SABS
for providing such excellent meeting facilities.
A warm thank you was also extended to the hosts and sponsors of the wonderful social event.
Thanks were also extended to the TC 29 secretariat.
Finally, the secretariat thanked the chairman for her capable and always very helpful guidance and support both
between and during meetings.
The meeting was closed on Friday 2014-02-21 at 10:30.
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29/844/RM
ANNEX A
Updated secretariat's report of IEC/TC 29 "Electroacoustics"
Membership of IEC/TC 29
Participating members (23):
Australia, Austria, Canada, China, Czech Republic, Denmark, Finland, France, Germany, India, Italy, Japan,
Netherlands, Norway, Poland, Romania, Russian Federation, South Africa, Spain, Sweden, Switzerland, UK,
USA.
Observing members (12):
Belgium, Brazil, Bulgaria, Croatia, Greece, Hungary, Korea Republic of, New Zealand, Serbia, Slovakia, Turkey,
Ukraine.
Working Groups and Maintenance Teams under IEC/TC 29
MT 4
convenor:
Sound level meters
Mr Peter Hanes, Canada
WG 5
convenor:
Measurement microphones
Mr Richard Barham, UK
WG 10
convenor:
Audiometric equipment
Mr Einar Laukli, Norway
WG 13
convenor:
Hearing aids
Mr Gert Ravn, Denmark
MT 17
convenor:
Sound calibrators
Ms Susan Dowson, UK
MT 18
convenor:
EMC requirements and updates of relevant IEC/TC 29 standards
Mr Richard Tyler, UK
MT 19
convenor:
Revision of IEC 61260, Filters
Mr Ole-Herman Bjor, Norway
MT 20
convenor:
Revision of IEC 60118-4, Induction loop
Mr Conny Andersson, Sweden
WG 21
convenor:
Head and ear simulators
Mr Thomas Fedtke, Germany
WG 22
convenor:
Audio-frequency induction-loop systems and equipment for assisted hearing
Mr John Woodgate, UK
MT 23
convenor:
Revision of IEC 61265, Instruments for aircraft noise certification
Void
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29/844/RM
Issue of standards and drafts
Since the last plenary meeting, 2012-09 in Charlottenlund, Denmark, the following have been issued:
STANDARDS
IEC 61094-8
IEC 61672-1
IEC 61672-2
IEC 61672-3
IEC 61260-1
TECHNICAL REPORTS TR 62809
FDIS
FDIS 61672-1
FDIS 61672-2
FDIS 61672-3
FDIS 61260-1
CDVs
CDV 60118-0
CDV 60118-4
CDV 60118-13
CDV 60318-3
IEC 62489-1 CDV/Amd 1
CDV 62489-2
CDs
CD 61669
CD 61260-2
CD 61260-3
NWIPs
NWIP 62886
DOCUMENT FOR
COMMENTS
DC 60318-7
DC 62489-1 further amendments
Progress of work items in the programme of work
IEC/TC 29/MT 4
WI 61672-1 Ed.2: IEC 61672-1 "Electroacoustics – Sound level meters – Part 1: Specifications"
-
Maintenance Cycle Report for revision of IEC 61672-1 given in doc. 29/689/MCR
First CD 61672-1, doc. 29/690/CD, circulated for comments before 2009-10-16
Background information for the revision of the IEC 61672-series given in doc. 29/695/INF
Compilation of comments given in doc. 29/706/CC
CDV 61672-1, doc. 29/724/CDV, circulated for voting before 2011-02-18
Result of voting given in doc. 29/739B/RVC, approved
FDIS 61272-1, doc. 29/812/FDIS, circulated for voting before 2013-08-16
Result of voting given in doc. 29/823/RVD, approved
IEC 61672-1 published 2013-09
WI 61672-2 Ed.2: IEC 61672-2 "Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests"
-
Maintenance Cycle Report for revision of IEC 61672-2 given in doc. 29/691/MCR
First CD 61672-2, doc. 29/692/CD, circulated for comments before 2009-10-16
Background information for the revision of the IEC 61672-series given in doc. 29/695/INF
Compilation of comments given in doc. 29/707/CC
CDV 61672-2, doc. 29/725/CDV, circulated for voting before 2011-02-18
Result of voting given in doc. 29/740B/RVC, approved
FDIS 61272-2, doc. 29/813/FDIS, circulated for voting before 2013-08-16
Result of voting given in doc. 29/824/RVD, approved
IEC 61672-2 published 2013-09
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WI 61672-3 Ed. 2: IEC 61672-3 "Electroacoustics – Sound level meters – Part 3: Periodic tests"
-
Maintenance Cycle Report for revision of IEC 61672-3 given in doc. 29/693/MCR
First CD 61672-3, doc. 29/694/CD, circulated for comments before 2009-10-16
Background information for the revision of the IEC 61672-series given in doc. 29/695/INF
Compilation of comments given in doc. 29/708/CC
CDV 61672-3, doc. 29/726/CDV, circulated for voting before 2011-02-18
Result of voting given in doc. 29/741C/RVC, approved
FDIS 61272-3, doc. 29/814/FDIS, circulated for voting before 2013-08-16
Result of voting given in doc. 29/825/RVD, approved
IEC 61672-3 published 2013-09
Revision of IEC 61252:2002 "Specifications for personal sound exposure meters"
-
Registered as a PWI after TC 29 decision in February 2014
IEC/TC 29/WG 5
WI 61094-3 Ed.2: First CD 61094-3 "Measurement microphones – Part 3: Primary method for free field
calibration of laboratory standard microphones by the reciprocity technique" (Revision of IEC 610943:1995)
-
Review Report for revision of IEC 61094-3 given in doc. 29/762/RR
First CD 61094-3, doc. 29/763/CD, circulated for comments before 2012-07-27
Compilation of comments given in doc. 29/784/CC
Extension of target date for submission of second CD to 2014-04-31
WI 61094-8 Ed.1: IEC 61094-8 "Measurement microphones – Part 8: Methods for determining the freefield sensitivity of working standard microphones by comparison"
-
NP, doc. 29/731/NP, circulated for voting before 2011-02-18
Result of voting given in doc. 29/743/RVN, approved
CDV 61094-8, doc. 29/752/CDV, circulated for voting before 2012-04-13
Result of voting given in doc. 29/759A/RVC, approved
IEC 61094-8 published 2012-09
Revision of IEC 61094-4:1995 "Measurement microphones – Part 4: Specifications for working
standard microphones"
-
Document for Comments, doc. 29/774/DC, circulated for comments before 2012-08-17
Review result given in doc. 29/789/INF
Registered as a PWI after TC 29 decision in February 2014
Revision of IEC 61094-5:2001 "Measurement microphones – Part 5: Methods for pressure calibration
of working standard microphones by comparison"
-
Document for Comments, doc. 29/775/DC, circulated for comments before 2012-08-17
Review result given in doc. 29/790/INF
PWI 29-38: Ultra-low-frequency calibration
-
Registered as a PWI after TC 29 decision in September 2012
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29/844/RM
IEC/TC 29/WG 10
WI 60645-1:2012 "Electroacoustics – Audiometric equipment – Part 1: Equipment for pure-tone
audiometry and WI 60645-2:1993 "Electroacoustics – Audiometers – Part 2: Equipment for speech
audiometry"
-
Amalgamated revision registered as a PWI after TC 29 decision in February 2014
WI 60645-2 Ed.2: Second CD 60645-2 "Electroacoustics – Audiometric equipment – Part 2: Equipment
for speech audiometry" (Revision of IEC 60645-2:1993)
-
Review Report for revision of IEC 60645-2 given in doc. 29/713/RR
First CD 60645-2, doc. 29/714/CD, circulated for comments before 2010-04-16
Compilation of comments given in doc. 29/718/CC
Second CD 60645-2, doc. 29/773/CD, circulated for comments before 2012-08-17
Compilation of comments given in doc. 29/787/CC
WI deleted after TC 29 decision in September 2012, and the revised text published as a WG 10
document
PWI 29-39: Revision of IEC 60645-3 "Electroacoustics – Audiometric equipment – Part 3: Test signals
of short duration"
-
Registered as a PWI after TC 29 decision in September 2012
PWI 29-36: Revision of IEC 60645-6:2009 "Electroacoustics – Audiometric equipment – Part 6:
Instruments for the measurement of otoacoustic emissions"
-
Registered as a PWI after TC 29 decision in April 2011
Registered as active wok item after TC 29 decision in February 2014
PWI 29-37: Revision of IEC 60645-7:2009 "Electroacoustics – Audiometric equipment – Part 7:
Instruments for the measurement of auditory brainstem responses"
-
Registered as a PWI after TC 29 decision in April 2011
Registered as active wok item after TC 29 decision in February 2014
IEC/TC 29/WG 13
WI 60118-0 Ed.3: CDV 60118-0 "Electroacoustics – Hearing aids – Part 0: Measurement of the
performance characteristics of hearing aids" (Amalgamated version of IEC 601118-0, IEC 60118-1,
IEC 60118-2 and IEC 60118-6)
-
Review Report for revision of IEC 601118-0, IEC 60118-1, IEC 60118-2 and IEC 60118-6 given in
doc. 29/749/RR
First CD 60118-0, doc. 29/750/CD, circulated for comments before 2012-01-06
Compilation of comments given in doc. 29/756/CC
CDV 60118-0, doc. 29/804/CDV, circulated for voting before 2013-09-06
Result of voting given in doc. 29/826/RVC, approved
WI 60118-13 Ed.4: CDV 60118-13 "Electroacoustics – Hearing aids – Part 13: Electromagnetic
compatibility (EMC)" (Revision of IEC 60118-13:2011)
-
Review Report for revision of IEC 60118-13 given in doc. 29/767/RR
First CD 60118-13, doc. 29/768/CD, circulated for comments before 2012-08-10
Compilation of comments given in doc. 29/788/CC
CDV 60118-13, doc. 29/805/CDV, circulated for voting before 2013-09-06
Result of voting given in doc. 29/827/RVC, approved
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WI 62809 Ed.1: TR 62809: Summary of requirements and tests to products in the scope of IEC 60601-266: Particular requirements for the basic safety and essential performance of hearing instruments and
hearing instruments systems
-
DTR 62809, doc. 29/776/DTR, circulated for voting before 2012-08-17
Result of voting given in doc. 29/791/RVC, approved
TR 62809 published 2013-01
WI 61669 Ed. 2: First CD 61669 "Electroacoustics – Measurement of real-ear acoustical performance
characteristics of hearing aids"
-
Review Report for revision of IEC 61669 given in doc. 29/806/RR
First CD 61669, doc. 29/807/CD, circulated for comments before 2013-07-12
Compilation of comments given in doc. 29/821/CC
WI 62886 Ed. 1: NP/TS 62886 "Electroacoustics – Hearing aids – Method for measuring the
electroacoustic performance u to 16 kHz"
-
NWIP, doc. 29/808/NP, circulated for voting before 2013-07-19
Result of voting given in doc. 29/822/RVN, approved
IEC 60118-2 Amendment 2 revision
-
Registered as a PWI after TC 29 decision in February 2014
Revision of IEC 60601-2-66:2012 "Medical electrical equipment – Part 2-66: Particular requirements for
the basic safety and essential performance of hearing instruments and hearing instrument systems"
-
Registered as active wok item after TC 29 decision in February 2014
IEC/TC 29/MT 17
Revision of IEC 60942:2003 "Sound calibrators"
-
Registered as a PWI after TC 29 decision in February 2014
IEC/TC 29/MT 18
IEC/TC 29/MT 19
IEC 61260-1 Ed.1: FDIS 61260-1 "Electroacoustics – Octave-band and fractional-octave-band filters –
Part 1: Specifications"
-
Announcement of setting up of MT 19 and call for experts given in Administrative Circular 29/462/AC of
2000-07
Confirmation of MT 19 and membership of MT 19 given in doc. 29/478/WG of 2000-10-20
Document for comments on the future revision of IEC 61260 given in doc. 29/491/DC
Maintenance Cycle Report for revision of IEC 61260-1 given in doc. 29/646/MCR
First CD 61260-1, doc. 29/647/CD, circulated for comments before 2008-05-02
Compilation of comments given in doc. 29/659/CC
Second CD 61260-1, doc. 29/720/CD, circulated for comments before 2010-09-17'
Compilation of comments given in doc. 29/727A/CC
CDV 61260-1, doc. 29/748/CDV, circulated for voting before 2012-03-02
Result of voting given in doc. 29/758A/RVC, approved
FDIS 61260-1, doc. 29/835/FDIS, circulated for voting before 2014-01-31
Result of voting given in doc. 29/839/RVD, approved
IEC 61260 published 2014-02
-24-
29/844/RM
WI 61260-2 Ed.1: First CD 61260-2 "Electroacoustics – Octave-band and fractional-octave-band filters –
Part 2: Pattern evaluation tests"
-
Review Report for revision of IEC 61260 given in doc. 29/829/RR
First CD 61260-2, doc. 29/830/CD, circulated for comments before 2014-01-31
Compilation of comments given in doc. 29/840/CC
WI 61260-3 Ed.1: First CD 61260-3 "Electroacoustics – Octave-band and fractional-octave-band filters –
Part 3: Periodic tests"
-
Review Report for revision of IEC 61260 given in doc. 29/833/RR
First CD 61260-3, doc. 29/834/CD, circulated for comments before 2014-01-31
Compilation of comments given in doc. 29/841/CC
IEC/TC 29/MT 20
WI 60118-4 Ed.3: CDV 60118-4 "Electroacoustics – Hearing aids – Part 4: Induction loop systems for
hearing aid purposes – System performance requirements" (Revision of IEC 60118-4:2006)
-
Review Report for revision of IEC 60118-4 given in doc. 29/765/RR
First CD 60118-4, doc. 29/766/CD, circulated for comments before 2012-07-27
Compilation of comments given in doc. 29/785A/CC
CDV 60118-4, doc. 29/797/CDV, circulated for voting before 2013-07-05
Result of voting given in doc. 29/819A/RVC, approved
IEC/TC 29/WG 21
WI 60318-3 Ed.2: CDV 60318-3 "Electroacoustics – Simulators of human head and ear – Part 3: Acoustic
coupler for the calibration of supra-aural earphones used in audiometry" (Revision of IEC 60318-3:1998)
-
Review Report for revision of IEC 60318-3 given in doc. 29/760/RR
First CD 60318-3, doc. 29/761/CD, circulated for comments before 2012-07-27
Compilation of comments given in doc. 29/783A/CC
CDV 60318-3, doc. 29/796/CDV, circulated for voting before 2013-04-12
Result of voting given in doc. 29/811/RVC, approved
WI 60318-7 Ed.1: DC 60318-7 "Electroacoustics – Simulators of human head and ear – Part 7: Head and
torso simulator for the measurement of hearing aids" (Revision of IEC/TS 60318-7:2011)
-
DC for revision of TS 60318-7 circulated for comments before 2014-01-17
Result of comments given in doc. 29/837/INF
IEC/TC 29/WG 22
WI IEC 62489-1:2010 Amendment: CDV Amendment to IEC 62489-1: Electroacoustics – Audiofrequency induction loop systems for assisted hearing – Part 1: Methods of measuring and specifying
the performance of system components
-
Review Report for an amendment to IEC 62489-1 given in doc. 29/765/RR
IEC 62489-1:2010 CD Amendment, doc. 29/779/CD, circulated for comments before 2012-09-07
Compilation of comments given in doc. 29/793/CC
IEC 62489-1:2010 CDV Amendment, doc. 29/799/CDV, circulated for voting before 2013-07-12
Result of voting given in doc. 29/818/RVC, approved
DC for an additional amendment of IEC 62489-1, given in doc. 29/815/DC, circulated for comments
before 2013-07-26
Result of comments given in doc. 29/820/INF
Approved to include the additional text in the DC in Amendment 1
-25-
29/844/RM
WI 62489-2 Ed.2: CDV 62489-2: Electroacoustics – Audio-frequency induction loop systems for
assisted hearing – Part 2: Methods of calculating and measuring the low-frequency magnetic field
emissions from the loop for assessing conformity with guidelines on limits for human exposure
-
Review Report for revision of IEC 62489-2 given in doc. 29/800/RR
First CD 62489-2, doc.29/801/CD, circulated for comments before 2013-05-03
Compilation of comments given in doc. 29/816/CC
CDV 62489-2, doc. 29/817/CDV, circulated for voting before 2013-12-06
Result of voting given in doc. 29/836/RVC, approved
IEC/TC 29/MT 23
WI 61265 Ed.2: Revision of IEC 61265:1995 "Instruments for measurement of aircraft noise –
Performance requirements for systems to measure one-third-octave-band sound pressure levels in
noise certification of transport-category aeroplanes"
Standards prepared by IEC/TC 29 "Electroacoustics"
IEC 60118-0:1983
Amendment 1:1994
Hearing aids – Part 0: Measurement of electroacoustic characteristics
IEC 60118-1:1999
Hearing aids – Part 1: Hearing aids with induction pick-up coil input
IEC 118-2:1983
Amendment 1:1993
Amendment 2:1997
Hearing aids – Part 2: Hearing aids with audiometric gain control circuits
IEC 60118-3:1983
Hearing aids – Part 3: Hearing aid equipment not entirely worn on listener
IEC 60118-4:2006
Electroacoustics – Hearing aids – Part 4: Induction loop systems for hearing aid
purposes – Magnetic field strength
IEC 60118-5:1983
Hearing aids – Part 5: Nipples for insert earphones
IEC 60118-6:1999
Hearing aids – Part 6: Characteristics of electrical input circuits for hearing aids
IEC 60118-7:2005
Electroacoustics – Hearing aids – Part 7: Methods of measurement of
performance characteristics of hearing aids for production, supply and delivery
quality assurance purposes
IEC 60118-8:2005
Electroacoustics – Hearing aids – Part 8: Methods of measurement of
performance characteristics of hearing aids under simulated in situ working
conditions
IEC 60118-9:1985
Hearing aids – Part 9: Methods of measurement of characteristics of hearing
with bone vibrator output
IEC 60118-12:1996
Hearing aids – Part 12: Dimensions of electrical connector systems
IEC 60118-13:2011
Electroacoustics – Hearing aids – Part 13: Electromagnetic compatibility (EMC)
IEC 60118-14:1998
Hearing aids – Part 14: Digital interface
IEC 60118-15:2012
Electroacoustics – Hearing aids – Part 15: Methods for characterising signal
processing in hearing aids with a speech-like signal
IEC 60263:1982
Scales and sizes for plotting frequency characteristics and polar diagrams
IEC 60318-1:2009
Electroacoustics – Simulators of human head and ear – Part 1: Ear simulator
for the measurement of supra-aural and circumaural earphones
-26-
29/844/RM
IEC 60318-3:1998
Electroacoustics – Simulators of human head and ear – Part 3: Acoustic
coupler for the calibration of supra-aural earphones used in audiometry
IEC 60318-4:2010
Electroacoustics – Simulators of human head and ear – Part 4: Occluded-ear
simulator for the measurement of earphones coupled to the ear by inserts
IEC 60318-5:2006
Electroacoustics – Simulators of human head and ear – Part 5: 2 cm3 coupler
for the measurement of hearing aids and earphones coupled to the ear by
means of ear inserts
IEC 60318-6:2007
Electroacoustics – Simulators of human head and ear – Part 6: Mechanical
coupler for the measurement of bone vibrators
TS 60318-7:2011
Electroacoustics – Simulators of human head and ear – Part 7: Head and torso
simulator for the measurement of hearing aids
IEC 60601-2-66:2012
Medical electrical equipment – Part 2-66: Particular requirements for the basic
safety and essential performance of hearing instruments and hearing
instrument systems
IEC 60645-1:2012
Electroacoustics – Audiometric equipment – Part 1: Equipment for pure-tone
audiometry
IEC 60645-2:1993
Electroacoustics – Audiometers – Part 2: Equipment for speech audiometry
IEC 60645-3:2007
Electroacoustics – Audiometric equipment – Part 3: Test signals of short
duration
Electroacoustics – Audiometric equipment – Part 5: Instruments for the
measurement of aural acoustic impedance/admittance
IEC 60645-5:2004
IEC 60645-6:2009
Electroacoustics – Audiometric equipment – Part 6: Instruments for the
measurement of otoacoustic emissions
IEC 60645-7:2009
Electroacoustics – Audiometric equipment – Part 7: Instruments for the
measurement of auditory brainstem responses
IEC 60942:2003
Electroacoustics – Sound calibrators
IEC 61012:1990
Filters for the measurement of audible sound in the presence of ultrasound
IEC 61043:1993
Electroacoustics – Instruments for the measurement of sound intensity –
Measurement with pairs of pressure sensing microphones
IEC 61094-1:2000
Measurement microphones – Specifications for laboratory standard
microphones
IEC 61094-2:2009
Measurement microphones – Part 2: Primary method for pressure calibration of
laboratory standard microphones by the reciprocity technique
IEC 61094-3:1995
Measurement microphones – Part 3: Primary method for free-field calibration of
Laboratory Standard Microphones by the reciprocity technique
IEC 61094-4:1995
Measurement microphones – Part 4: Specifications for working standard
microphones
IEC 61094-5:2001
Measurement microphones – Part 5: Methods for pressure calibration of
working standard microphones by comparison
IEC 61094-6:2004
Measurement microphones – Part 6: Electrostatic actuators for determination of
frequency response
-27-
29/844/RM
TS 61094-7:2006
Measurement microphones – Part 7: Values for the difference between freefield and pressure sensitivity levels of laboratory standard microphones
IEC 61094-8:2012
Measurement microphones – Part 8: Methods for determining the free-field
sensitivity of working standard microphones by comparison
IEC 61183:1994
Electroacoustics – Random-incidence and diffuse-field calibration of sound
level meters
IEC 61252:2002
Amendment 1:1993
Electroacoustics – Specifications for personal sound exposure meters
(Consolidated with edition 1:1993 and Amendment 1:2000)
IEC 61260-1:2014
Electroacoustics – Octave-band and fractional-octave-band filters
Electroacoustics – Instruments for measurement of aircraft noise –
Performance requirements for systems to measure one-third-octave band
sound pressure levels in noise certification of transport-category aeroplanes
Corrigendum 1 published June 2005
IEC 61265:1995
IEC 61669:2001
Equipment for the measurement of real-ear acoustical characteristics of hearing aids
IEC 61672-1:2013
Electroacoustics – Sound level meters – Part 1: Specifications
IEC 61672-2:2013
Electroacoustics – Sound level meters – Part 2: Pattern evaluation tests
IEC 61672-3:2013
Electroacoustics – Sound level meters – Part 3: Periodic tests
TS 62370:2004
Instruments for the measurement of sound intensity – Electromagnetic and
electrostatic compatibility requirements and test procedures
IEC 62489-1:2010
Electroacoustics – Audio-frequency induction loop systems for assisted hearing –
Part 1: Methods of measuring and specifying the performance of system
components
IEC 62489-2:2011
Electroacoustics – Audio-frequency induction loop systems for assisted hearing –
Part 2: Methods of calculating and measuring the low-frequency magnetic field
emissions from the loop for assessing conformity with guidelines on limits for human
exposure
IEC 62585:2012
Electroacoustics – Methods to determine corrections to obtain the free-field
response of a sound level meter
TR 62809:2013
Summary of requirements and tests to products in the scope of IEC 60601-266: Particular requirements for the basic safety and essential performance of
hearing instruments and hearing instruments systems
-28-
29/844/RM
ANNEX B
Liaison report of IEC TC 87 "Ultrasonics"
Dear Ms. Dowson, Chairman TC29:
Please accept the following summary of TC87 activities in the past year as our liaison report:
General/Administrative
TC87 WGs 8, 9, 13 & 14 of TC87 are met in Kailua-Kona Hawaii, USA February 11-14, 2013.
IEC TC87 held meetings of its working groups and a plenary session in Delhi India, October 21-25, 2013
as part of the IEC General Meeting. Details of this meeting are available upon request.
TC87 WGs 6, 8, 9 & 14 are scheduled to meet in Frankfurt Germany 7-11 July, 2014.
The next full meeting of TC87, its plenary, and working groups will take place in the spring of 2015 at a
date and location still to be determined.
Documents:
The following documents have been issued for review and comment by the national committees during
the past year.
a. 87/521/DTS & 87/545/RVC: IEC/TS 62556: Ultrasonics - Surgical systems - Specification and
measurement of field parameters for High Intensity Therapeutic Ultrasound (HITU)
transducers and systems. This document was approved and is scheduled to be published in
February 2014.
b. 87/530/FDIS: Amendment 1 to IEC 62127-3: Ultrasonics – Hydrophones – Part 3: Properties
of hydrophones for ultrasonic fields up to 40 MHz. This document closed for votng on 201305-03. It was approved and has been published.
c. 87/532/CD: IEC62736: Ultrasonics – Pulse-echo Scanners - Quality Control of Diagnostic
Medical Ultrasound Systems - Simple Methods for Periodic Testing to Verify Stability of an
Imaging System's Elementary Performance. This draft closed for comment on 2013-07-05
and was discussed at the meeting in Delhi India. The forecast publication date is 2014-12.
d. 87/538/FDIS: IEC 62555: Ultrasonics – Power measurement - High intensity therapeutic
ultrasound (HITU) transducers and systems. This document closed for votng on 2013-09-13.
It was approved and has been published.
e. 87/542/CD: IEC/TS 62791: Ultrasonics - Pulse-echo scanners - Low-echo sphere phantoms
and methods for performance testing of gray-scale medical ultrasound scanners applicable to
a broad range of transducer types. This draft closed for comment on 2013-12-06 and will
discussed at the meeting in Frankfurt Germany. The forecast publication date is 2015-09.
Sincerely,
John Abbott, Chairman IEC TC87
29
ANNEX
C
14‐02‐12
Presentation of the IEC/CO for the IEC/TC 29 meeting,
2014-02-17/21 in Pretoria
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Establishment of new Committees
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Secretariat: China (SMB Decision 147/14)
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Secretariat: Japan (SMB Decision 148/16)
Pretoria, South Africa, February 2014
Pierre Sebellin
Technical Officer
pse@iec.ch
4
IEC in figures
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
ƒ
Plenary meetings by correspondence
IEC Family (members + affiliates)
82 + 83 =165
Number of TC/SC
97 + 81 = 178
Number of WG/PT/MT
SMB Decision 147/22 (2013-06)
The SMB, noting that it is not always possible to
participate physically at all plenary meetings,
encourages P-members to make comments on agenda
topics in advance of the meeting.
However, as they have not taken part in the
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1 274
Number of experts
over 13 000
Number of pubs. in catalogue
6 939
Number of pubs. issued in 2013
317
Number of active projects (2013/12/31)
1558
Average development time (in 2013)
33.5 Months
2
TC 29 in figures
5
Chairmen Term of Office
Experts by NC
Participation
18
18
SMB Decision 146/15 (2013-02)
16
P‐Members
24
14
O‐Members
11
10
Total experts
95
12
12
10
8
8
7
6
6
5
5
4
2
2
2
2
2
(including 5 liaisons)
TC/SC Chairmen terms of office shall be limited to an
initial term of a maximum of 6 years, followed by a
single extension of a maximum of 3 years.
4
4
2
1
1
1
1
1
0
Total records
DK DE GB CH FR US CA JP RU SE AT ES IT NO NZ AU CZ NL PL ZA
201
(the Experts are active in 2 groups in average)
Experts by WG
35
30
33
29
29
25
22
21
20
16
15
14
11
10
8
7
5
5
0
MT 4 MT
17
MT
18
MT
19
MT
20
MT WG 5 WG
23
10
WG
13
WG
21
WG
22
3
6
1
30
2014‐02‐12
Presentation of the IEC/CO for the IEC/TC 29 meeting,
2014-02-17 to 21 in Pretoria
Distribution of TC/SC Chairs
NCs’ comments available on IEC web site
40
Click here for the vote results
32
Click here for the Comments
20
16
12
9
5
4
4
4
3
3
3
2
2
1
1
1
1
1
1
1
1
1
1
Total 170 (data as of 2013-09-10)
4 Chairmen to be appointed
10
7
New role: Vice Chairman
New IEC template
ƒ Created to support IEC experts in the development of IEC
publications
ƒ Replaces the old template and available on the IEC website from
8 July 2013, together with a new user guide
ƒ Available for English (iecstd.dot) and for French publications
(iecstd_f.dot).
ƒ Can be used in all versions of MS Word starting from 2002. All
documents can be downloaded at:
http://www.iec.ch/standardsdev/resources/draftingpublications/l
ayout_formatting/IEC_template/iec_template.htm
Technical committees and subcommittees can choose and decide
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Technical committees and subcommittees are given wide latitude in
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choose to appoint, however, the following conditions apply:
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nomination of candidate(s) for the role.
Vice-Chairmen can be appointed for up to three (3) years.
See AC/44/2011 for details
See AC/25/2013 for details
8
NCs’ comments available on IEC web site
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New IEC template
ƒ Compilations of NCs’ comments on TC/SC working documents
(NPs, CDs, CDVs, DCs, etc.) available within few hours after the
end of the voting/commenting period
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submitted will be circulated as usual by means of the
corresponding documents CC or RVC document provided by the
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See AC/23/2013 for details
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9
12
2
2014‐02‐12
31
Drafting IEC publications
e-tech magazines in 2013
Overview and guidelines available
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March
April
May
June
July
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October
November
December
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New IEC Website Home Page
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Calendar of next IEC General Meetings
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Copyright
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-32-
29/844/RM
ANNEX D
DAY REPORT
from the meeting of IEC/TC 29/MT 4 "Sound level meters"
Monday 17 (p.m.) and Tuesday 18 February 2014
in Pretoria, South Africa
Participation
Members:
Mr P Hanes
Mr O-H Bjor
Mr I Bork
Mr K Cox
Ms S Dowson
Mr J Gramtorp
Mr R Nel
Mr M Ohya
Mr D Rodrigues
Mr R Tyler
Convenor, Canada
Norway
Germany
USA
UK
Denmark
South Africa
Japan
France
UK
Observers:
Mr T Groß
Mr U Mehr
Mr C Walber
Germany
Denmark
USA
(Tuesday only)
(Monday only)
(Tuesday only)
(Monday only)
1. Opening
The meeting opened with thanks to the South African Bureau of Standards for hosting the meeting and a
tribute to the memory of Alan Marsh, former convenor, who sadly passed away in December 2013.
2. IEC 61672 "Sound level meters"
The Second Editions of Parts 1, 2, and 3 of IEC 61672 were published in September 2013. On Monday
afternoon, the results of voting were discussed and one minor editorial error in Part 3 was noted.
Needs were identified for a description of the changes from the First Edition to the Second Edition for the
general audience of users of instruments, and for a general list of the technical changes.
Maintenance Team members reported that the Second Editions were being adopted in their countries.
There is a concern that the uncertainties given in IEC/TS 61094-7 for the values of the differences
between free-field and pressure sensitivity levels of laboratory standard microphones form a significant
part of the uncertainties in the measurement of frequency weighting of sound level meters and WG 5 will
be asked to review the uncertainty data.
On Tuesday morning, a proposal to amend the lower limit of the range of carrier frequencies for immunity
to the effects of exposure to radio-frequency fields from 26 MHz to 90 MHz was considered. The same
limit is used in many standards prepared by TC 29, so MT 18 will be asked to review the proposed
change.
-33-
29/844/RM
3. IEC 61252 "Specifications for personal sound exposure meters"
The meeting re-confirmed the need to revise IEC 61252 "Specifications for personal sound exposure
meters". Project Leader Philip Battenberg was unable to attend the meeting but his ad-hoc group had
begun to prepare a draft. On Monday afternoon a list of characteristics for which specifications are
required in the standard was agreed. On Tuesday morning various technical specifications were agreed
and test methods for the main characteristics were discussed. The nature of these instruments will likely
require extensive acoustical testing for pattern evaluation, while it is planned that the majority of periodic
testing can be performed in terms of indicated sound pressure levels. Several members volunteered to
experiment with methods for testing using acoustical input signals.
The convenor will discuss progress with the Project Leader, determine whether further development will
take place within the ad-hoc group or within MT 4, and establish a schedule for the production of a first
Working Draft and its circulation to MT 4 for comments before the next meeting.
4. New technologies and market requirements
Johan Gramtorp had led an ad-hoc group to assess the impact of new technologies, including digital
detectors and microphones with integrated preamplifiers, on standards for sound level meters. On
Tuesday afternoon, Mr Gramtorp concluded the work of the group by leading a discussion on the
capabilities of existing test equipment, and on the urgent issues for standards and strategies for their
mitigation. The planned studies of acoustical test methods will benefit all future work in MT 4. There is a
need to ensure that suitable affordable acoustical signal sources become available.
Ole-Herman Bjor presented results of test methods that use swept-sine excitation signals.
There is a concern that the increasing prevalence of applications for handheld devices that claim to
measure sound pressure levels but whose performance is untested may cause a reduction in the use of
appropriate standardized instruments unless users are made aware of the shortcomings of the handheld
devices.
5. Stability Dates
The Stability Dates of all three Parts of IEC 61672 were reviewed and left unchanged as 2016. The
Stability Date of IEC 61252 was reviewed and changed from 2015 to 2016.
6. Any other business
Suggestions for new guidance documents within TC 29 were requested, but none were received.
7. Next meeting
The time and place of the next meeting of MT 04 is planned to coincide with the next meeting of TC 29 in
the second half of 2015.
-34-
29/844/RM
ANNEX E
DAY REPORT
from the meeting of IEC/TC 29/WG 5 "Measurement microphones"
Thursday 20 February 2014
in Pretoria, South Africa
Participation
Members:
Mr R Barham (Convener)
Mr T Fedtke
Mr P Hanes
Mr R Horiuchi
Mr U Mehr
Mr D Rodrigues
Mr E Sandermann Olsen
Mr C Walber
UK
Germany
Canada
Japan
Denmark
France
Denmark
USA
Observers:
Mr S Kubeka
Mr G Motaung
Mr R Nel
Mr M Nilsson
Mr R Rohweder
Mr Z Soares
Mr I Veldman
Mr T Groβ
South Africa
South Africa
South Africa
Denmark
Germany
Brazil
South Africa
Germany (pm only)
1.
Opening
Apologies were received from Mr S Barrera-Figueroa, Mr F Chinchurreta, Mr J Durocher, Mr C Guglielmone,
Mr A Konkov, Mr A Vishniakov, Mr O Bjor, Mr L Wu and Mr J Casamaro.
The meeting was opened at 09:00 and the members and observers welcomed by the convenor.
Membership of WG05 was reviewed and the draft agenda was approved.
2.
Review of status of 61094-5 "Electroacoustics – Measurement microphones – Part 5: Methods
for pressure calibration of working standard microphones by comparison"
Project leader: Mr R Barham
A second working draft was prepared for discussion at the meeting. The document was reviewed clause by
clause, with particular attention given to the newly introduced technical details.
It transpired that most of the discussion related to editorial and minor technical issues, and WG5 were
generally satisfied with the state of the draft.
A revised document based on the decisions at the meeting will be prepared by March 2014 for presentation as
a first CD.
-353.
29/844/RM
Review of status of IEC 61094-3 "Electroacoustics – Measurement microphones – Part 3:
primary method for free-field calibration of laboratory standard microphones by the reciprocity
technique"
Project leader: Mr S Barrera-Figueroa.
The project leader was unavailable to attend the meeting in person, but provided an updated draft document
for discussion, together with some notes on particular issues to help guide the discussion. Mr Figueroa was
however, able to join the meeting for a short while via a web conference facility kindly made available by the
host and Secretariat.
While the whole document was reviewed, special consideration was given to the areas for attention identified
at the last meeting of WG5, namely the ground-shield details, specification of a reference point for relating the
phase response and the annex on air attenuation. Solutions to these issues have been developed and now
incorporated in the draft document following discussions within the WG. Other issues discussed included the
addition of nominal numerical acoustic centre data and revisions to some parts of the annex on time selective
techniques.
Having now resolved the technical issues that were delaying the document, the working group agreed
produce a second CD for distribution by April 2014.
4.
Discussion of the proposed revision of IEC 61094-4 "Electroacoustics – Measurement
microphones – Part 4: Specifications for working standard microphones"
Project leader: Mr R Barham
The working group discussed the requirements for a revision of this document, noting that there is a growing
list of developments requiring an extension in scope, including;
• Whether the document actually covers devices operating with non-electrostatic transduction
mechanisms, as currently stated in the scope;
• Specification of microphone configurations where the body and the protection grid have the same
diameter;
• Specification for eighth-inch microphones and the associated ground-shield configuration.
• Further specification of the grid configuration for compatibility with sound calibrators
• Specifications covering combined microphones and preamplifers where they cannot be separated
• Consideration of the need to specify tolerances for the frequency response, and the consequences for
P, F and D designations
It was therefore decided to proceed with working drafts of the document to foster discussion within WG5, while
allowing sufficient time for the requirements in these areas to evolve. Therefore, there are no specific plans
yet to produce a first CD.
5.
Informal discussion of free-field to pressure sensitivity level differences for laboratory standard
microphones and IEC/TS 61094-7
It has been noted that the uncertainty associated with the data specified in IEC/TS 61094-7 is a significant
contributor to the measurement uncertainty that can be achieved in secondary free-field microphone
calibration, and related applications such as sound level meter verification. This uncertainty arises from the
degree of consistency that could be achieved from measurement data and calculations provided by a number
of institutes at the time.
As reported previously, a BIPM key comparison (CCAUV.A-K4) on primary free-field of laboratory standard
microphones, did not lead to an improvement in the degree of consistency needed for lower measurement
uncertainty estimates. However, since then around nine institutes have reported new or improved
measurement capabilities, and there is now a good prospect of further data emerging. For some time, the WG
convenor has announced his interest in collecting any such data, within various metrology communities
including BIPM CCAUV and EURAMET TC-AUV, and will now actively pursue the quest. Once the number of
new data sources is sufficient, it will be possible re-evaluate the degree of consistency in the pressure-to-freefield differences, and consider a revision of IEC 61094-7. However the timescale for this is entirely dependent
on new data becoming available and cannot currently be specified. One approach discussed is the possibility
of publishing an evaluation of the degree of consistency in a scientific journal, ahead of a revision of
IEC 61094-7.
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NWIP on ultra-low-frequency calibration methods for measurement microphones
Mr O Bjor (Norway) and Mr Bork (Germany) joined the meeting to discuss this agenda item.
It was considered still to be too early to formulate a NWIP on this topic. However the WG heard a presentation
from Mr Bjor on a method that exploits static pressure dependence with height to provide a potential absolute
calibration method. Other suggestions included calculable pistonphones (e.g. those using laser interferometry),
dead weight methods where the decay following a step change is analysed, and various secondary methods
using pressure chambers or comparison couplers.
There was also a discussion of the scope of any future document. This is difficult to prescribe until more
details of potential methods are known, but for now it was agreed to cover the frequency range from DC to
20 Hz, and to consider both absolute and secondary methods. It was also agreed that the title of the NWIP
should be changed to “Calibration methods for measurement microphones at infrasound frequencies”.
It was agreed that all those with experience of such methods submit details to Thomas Fedke who will coordinate the preparation of the NWIP in the German NC.
7.
Discussion of potential requirements for new parts of the IEC 61094 series, and consideration of
the TC29 strategic goals.
Working group members were asked their opinion about topics for future inclusion in the 61094-series,
considering also new technologies or market drivers. The following topics were raised and discussed, or
reviewed from previous meetings.
Digital microphones
These microphones are likely to become more prevalent. While there is limited current experience, the
general view was that it should be possible to accommodate digital microphones within the scope of existing
documents, with only minor changes. Indeed, Ian Veldman reported that this has been the case with digital
accelerometers.
Shock and impulsive calibration
A potential requirement for calibration techniques at the upper end of the dynamic range of the microphone,
was highlighted. Applications in quarrying, geo-surveying and aerospace were cited.
Probe microphone calibration
It was noted that existing calibration applications usually require exposure of the microphone diaphragm to the
sound field. Mr Walber agreed to prepare a positioning paper for future discussion in the WG
Diffuse-field calibration of microphones, optical calibration of microphones and MEMS working standard
microphones
The topics above were identified at previous meetings and were reviewed, but no change in status was noted.
8.
Review of the maintenance cycle for WG 5
The stability dates for all documents in the 61094-series were reviewed and the following new dates agreed.
Prev.
New
IEC 61094-1 Ed. 2.0
2014
2015
IEC 61094-2 Ed. 2.0
2014
2015
IEC 61094-3 Ed. 1.0
2013
2014
IEC 61094-4 Ed. 1.0
2014
2015
IEC 61094-5 Ed. 1.0
2014
2015
IEC 61094-6 Ed. 1.0
2015
2015
IEC 61094-8 Ed. 1.0
2016
2016
IEC/TS 61094-7 Ed. 1.0
2014
2015
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Other business
Mr Sandermann Olsen presented some current issues with pressure reciprocity calibration, highlighting in
particular some anomalies with the current models for heat conduction specified in IEC 61094-2. This is the
topic of research activity at some institutes, and further work is needed to resolve remaining issues and bring
a level of confidence to the final recommendations. Solutions to the set of issues presented will be a strong
driver for a revision of IEC 61094-2.
Mr Barham made a proposal to revise the “AIP Handbook of condenser microphones”, first published in 1997.
This is not an WG activity but the book is strongly connected to the 61094-series of standards and is in need
of complete revision. The opportunity was taken to consult with the group of experts and there was some
support for the proposal.
10.
Date and place of next meeting
It was agreed that the proposed work for the immediate future could be handled by email correspondence,
and that the video conferencing facility could be used if necessary.
The next meeting of WG05 will therefore be held in conjunction with the next TC29 meeting.
The meeting closed at 15:45.
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ANNEX F
DAY REPORT
from the meeting of WG 10 "Audiometric equipment"
Wednesday 19 February 2014 in Pretoria, South Africa
Participation
Members:
Mr E. Laukli
Mr R. Barham
Mr G. Frost
Mr T. Fedtke
Mr R. Rohweder
Mr R. L. Grason
Mr L. H. Jensen
Mr M. Tateno
Convenor, Norway
UK
UK
Germany
Germany
USA
Denmark
Japan
Observers
Mr. Y. Fujisaka
Mr. Z. Soares
Mr. G. Motaung
Japan
Brazil
South Africa
1.
Opening of the meeting
The meeting was opened at 09:00, and the members were welcomed by the convenor.
2.
Approval of the draft agenda, doc. TC 29/WG 10(Secretariat)166
The draft agenda was approved.
3.
Membership and convenorship of WG 10
There are at present 16 members of WG 10. Eight of them met at this occasion.
The present convenor has decided to retire and Erik Nielsen from Denmark – who, unfortunately, could not
attend the meeting in Pretoria – had been asked to replace him as a new convenor of WG 10. He has
confirmed interest in the position. WG 10 has applauded the choice and the proposal will be presented to the
plenary meeting for confirmation.
4.
Note of the minutes from the last meeting, doc. TC 29/WG 10(Laukli)162
There were no comments to the draft report from the meeting in Charlottenlund, 19 September 2012.
5.
Status of documents
Since the last WG 10 meeting no standards under the responsibility of WG 10 have been published.
6.
Discussion of revision of IEC 60645-1 “Electroacoustics - Audiometric equipment – Part 1:
Equipment for pure-tone and speech audiometry” (Revision of IEC 60645-1:2010)
The project leader, Rufus Grason, had prepared a working draft, doc. WG 10 N 165, which had been
circulated in January 2014 to the working group members. The document was discussed page by page, and
some corrections were made on-line.
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Other more extensive comments will be sent to the project leader before the end of March, and a 2WD will be
sent to the working group members by the project leader before the end of April. Comments to the 2WD will
then be sent to the project leader before end of June 2014, and a CD will be presented before the end of this
year.
ACTION: Mr. Grason.
7.
Discussion of a possible revision of IEC 60645-3:2007 "Electroacoustics – Audiometric
equipment – Part 3: Test signals of short duration"
New stimulus-types may be included in part 3, and both different broad-band and narrow-band chirps as well
as modulated waveforms used for auditory steady state responses may be described as additional reference
signals.
No progress has been made since the last meeting but the project will continue.
ACTION: Mr. Fedtke
8.
Discussion of revisions of 60645-6 "Electroacoustics – Audiometric equipment – Part 6:
Instruments for the measurement of otoacoustic emissions" and 60645-7 "Electroacoustics –
Audiometric equipment – Part 7: Instruments for the measurement of auditory brainstem
responses"
Due to lack of consistencies with CEN/CENELEC guidelines, these two standards have not been listed in their
Official Journal. It has therefore been proposed to revise these them to fulfil the requirements of
CEN/CENELEC.
The project leader, Erik Nielsen, has tried to communicate with the consultant from CENELEC but little
progress has been made. The project will continue.
ACTION: Mr. Nielsen
9.
Review of the stability dates
The following new stability dates were recommended:
60645-1: 2015
60645-2: 2015
60645-3: 2016
60645-5: 2017
60645-6: 2015
60645-7: 2015
10.
Any other business
The working group thanked the convenor for his ten years of leadership.
11.
Date and place of the next meeting
WG 10 will probably not meet until the next plenary meeting during the fall of 2015.
12.
Closing of the meeting
The meeting was closed at 14:00, and the convenor thanked all members for active work during this day.
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ANNEX G
DAY REPORT
from the meeting of IEC/TC 29/WG 13 "Hearing aids"
Monday 17 (p.m.) and Tuesday 18 February 2014
in Pretoria, South Africa
Participation
Members:
Mr G Ravn
Mr H O Bindeballe
Mr O Dyrlund
Mr G Frost
Mr A Gebert
Mr R L Grason
Mr L H Jensen
Mr E Laukli
Mr D Lommel
Mr C Meythaler
Mr M Nilsson
Mr D Preves
Mr R Rohweder
Mr R Stein
Mr M Tateno
Mr M Vlaming
Convenor, Denmark
Denmark
Denmark
UK
Germany
USA
Denmark
Norway
Germany
Germany
Denmark
USA
Germany
USA
Japan
Netherlands
Observers:
Mr T Fedtke
Mr U Mehr
Mr G Moaung
Mr S Jønsson
Mr Z M.D. Soares
Germany
Denmark
South Africa
Denmark
Brazil
(by internet conference tool)
(Tuesday only)
(Tuesday only)
(Monday only)
(Monday only)
TC 29 Secretariat:
Mr L Nielsen
Apologies:
B Cole
1.
Canada
Opening of the meeting
The convenor opened the meeting and welcomed the participants.
2.
Approval of the revised draft agenda, doc. WG 13(Secretariat)258
Due to interest from members of WG 21 only able to attend the Monday meeting, items 6 and 9 were
interchanged. The agenda was approved.
3.
Membership of WG 13
No new experts had been registered since the last meeting.
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Note of the minutes from the last meeting, doc. WG 13(Ravn)249
No comments had been received on the report from the last meeting, 23 September 2013 in Denmark, which
was, therefore, approved.
5.
Status of documents
All items under the responsibility of WG 13 were on the agenda for this meeting.
6.
Discussion of the voting result and comments on doc. 29/805/CDV: CDV 60118-13
"Electroacoustics – Hearing aids – Part 13: Electromagnetic compatibility (EMC)
CDV 60118-13 had been circulated for voting by 2013-09-06. The result of voting and comments on
CDV 60118-13, given in doc. WG 13 N 246 (voting result with comments sorted in country order) and doc.
WG 13 N 247 (comments sorted in clause order) were reviewed and discussed under the guidance of the
project leader, Gert Ravn.
Main discussions and decisions were:
•
•
ESD requirements changed to 2 and 4 kV for air discharge and 8 kV for indirect contact discharge.
Bystander compatibility testing was kept at 3 V/m for the complete test range.
DECISION: To be proceeded with as an FDIS. The FDIS layout to be submitted to the secretariat before the
end of May 2014. Prior to the submission, the revised text will be circulated to WG 13.
ACTION: Gert Ravn.
7.
Discussion of the voting result and comments on doc. 29/804/CDV: CDV 60118-0
"Electroacoustics – Hearing aids – Part 0: Measurement of the performance characteristics of
hearing aids"
CDV 60118-0 had been circulated for voting by 2013-09-06. The result of voting and comments, given in doc.
WG 13 N 244 (voting result with comments sorted in country order) and doc. N 245 (comments sorted in
clause order) were reviewed and discussed under the guidance of the project leader, Marcel Vlaming.
Main discussions and decisions were:
•
•
•
Stay with a frequency range up to 8 kHz, all exceptions for 200-5000 Hz range deleted.
Permission to use an ear simulator according to IEC 60318-4 for a few additional measurements will
be included in this version although the ultimate intent is to shift to the 2cc coupler according to
IEC 60318-5.
IEC 60118-2 Amd 2 using a steady state broadband signal should not be withdrawn, but should be
revised as a new revision of IEC 60118-2.
DECISION: To be proceeded with as an FDIS. The FDIS layout to be submitted to the secretariat before the
end of May 2014. Prior to the submission, the revised text will be circulated to WG 13.
ACTION: Marcel Vlaming.
8.
Discussion of the comments on doc. 29/807/CD: First CD 61669 "Electroacoustics –
Measurement of real-ear acoustical performance characteristics of hearing aids"
A first CD 61669 had been circulated for comments by 2013-07-12. The comments were given in doc.
29/821/CC (result with comments sorted in country order) and in doc. WG 13 N 243 (comments sorted in
clause order). In the absence of the project leader B. Cole, the comments were reviewed and discussed under
the guidance of the convenor.
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Main discussions and decisions were:
•
The document should describe use of a suitable adaptor for the reference microphone and an external
acoustic calibrator at least once every year.
DECISION: To be proceeded with as a CDV. The CDV layout to be submitted to the secretariat before the end
of May 2014. Prior to the submission, the revised text will be circulated to WG 13.
ACTION: Bill Cole.
9.
Discussion of the voting result on doc. 29/808/NP: NP 62866 "Hearing aids – Method for
measuring the electroacoustic performance up to 16 kHz"
The NWIP for a coupler for high frequency measurements, doc. 29/808/NP had been approved and allocated
project number 62866. The result and comments given in doc. 29/822/RVN (voting result with comments
sorted in country order) and doc. WG 13 N 242 (comments sorted in clause order) were reviewed and
discussed under the guidance of the project leader, Anton Gebert.
Main discussions and decisions were:
•
•
•
This is to be seen as an addition to the 2cc coupler for use up to 16 kHz.
The document is not developed as a standard, but as a Technical Specification to establish the
possibility of collecting data using the 0,4cc coupler with hearing aids in the high frequency range.
If the coupler later should be developed and described, this task shall be handed over to WG 21.
DECISION: To be proceeded with as a DTS (Draft Technical Specification). The DTS layout to be submitted
to the secretariat before the end of May 2014. Prior to the submission, the revised text will be circulated to
WG 13.
ACTION: Anton Gebert.
10.
Revision of IEC 60601-2-66:2012 "Medical electrical equipment – Part 2-66: Particular
requirements for the basic safety and essential performance of hearing instruments and hearing
instrument systems
An invitation to suggest corrections or modifications had been circulated to WG 13 on 2013-11-15.
The comments given in doc. WG 13 N 259 together with a first working draft given in doc WG 13 N 260 had
been sent to WG 13 just prior to the meeting. The documents were reviewed and discussed under the
guidance of the project leader, Clemens Meythaler.
Main discussions and decisions were:
•
The document should not be circulated as an amendment, but as a revision of IEC 60601-2-66.
DECISION: To be proceeded with as CDV. The CDV layout to be submitted to the secretariat before the end
of May 2014. Prior to the submission, the revised text will be circulated to WG 13.
ACTION: Clemens Meythaler.
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Review of the maintenance cycle for standards under the responsibility of WG 13
WG 13 discussed the maintenance cycles and agreed on the dates given in the below table:
Publication no.
60118-0
60118-1
60118-2,A1
60118-2,A2
60118-5
60118-6
60118-7
60118-8
60118-9
60118-12
60118-13
60118-14
60118-15
60601-2-66
61669
12.
Stability date
2014
2014
2014
2014
2015
2014
2015
2015
2015
2015
2014
2015
2015
2014
2014
Responsibility)
WG 13
WG 13
WG 13
WG 13
WG 13
WG 13
WG 13
WG 13
WG 13
WG 13
WG 13
TC 29 MT
WG 13
WG 13
WG 13
Any other business
Nothing.
13.
Date and place of next meeting
It was decided that the next meeting of WG 13 would take place on 2 February 2015 in Copenhagen,
Denmark.
14.
Closing of the meeting
The meeting on Monday was closed at 17 h 45. The meeting on Tuesday was closed at 15 h 15.
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ANNEX H
DAY REPORT
from the meeting of IEC/TC29/MT 17 "Sound calibrators"
Wednesday 19 February 2014
in Pretoria, South Africa
Participation
Members:
Ms S Dowson
Mr O-H Bjor
Mr I Bork
Mr K Cox
Mr J Gramtorp
Mr P Hanes
Mr U Mehr
Mr R Nel
Mr M Ohya
Mr E Sandermann Olsen
Mr D Rodrigues
Mr R Tyler
Convenor, UK
Norway
Germany
USA
Denmark
Canada
Denmark
South Africa
Japan
Denmark
France
UK
Observers:
Mr T Groß
Mr R Horiuchi
Mr S Kubeka
Mr M Nilsson
Mr C Walber
Germany
Japan
South Africa
Denmark
USA
1.
Opening of the meeting and roll call of members
The Members and Observers were welcomed by the Convenor, and introductions performed. Apologies were
received from Mr J Casamajo, Mr F Chinchurretta, Mr P Dickinson, Ms D Dobrowska, Mr J-N Durocher, Mr S
Figueroa, Mr C Guglielmone, Mr A Konkov, Mr Y Kurilenko and Mr D Wallis.
2.
Agenda
The proposed Agenda was accepted by the MT, with no changes/additions.
3.
Revision of IEC 60942: 2003 ‘Sound calibrators’, Edition 3
Discussions of comments received on WD1 of IEC 60942:2003 September 2013.
The comments given in the circulated document ‘Compilation of Comments on WD1 IEC 60942 Ed4 v2_6 Dec
13’, as well as a few others raised during the meeting, were all discussed by the MT and Observations agreed.
This 1WD had been produced to include Observations agreed at the previous meeting, the new TC/29
uncertainty policy and changes required by the IEC Directives.
A key point to note was the decision to remove the class C designation for class 1 and class 2 sound
calibrators, and the addition of a new class 1/P to cover devices based on mechanical operation such as
pistonphones. This new class is particularly required for use with outdoor monitoring systems. Classes LS and
LS/C remain unchanged. This decision was taken after careful consideration of all the replies submitted to the
Convenor following the earlier circulated questions requesting the views of MT members, who often consulted
with others in their country before replying, and in the knowledge that, looking to the future, technology and
component prices are such that automatic compensation across the entire range of environmental conditions
is now much easier to perform. Clarifications and some minor technical changes were also made to the text.
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Further data is required to confirm some of the changes made and MT members will be asked to carefully
consider the impact on the rest of the document of the agreed changes to the class designations, and to
supply data where appropriate.
The MT had previously decided that Annex C of the document, which currently contains the complete format
for the Pattern Evaluation Report, would be considerably shortened, by providing a link to some form of
software document, which would give the complete report. However, information from Central Office shows
that this is not possible for a Normative Annex so it was decided not to include a detailed pattern evaluation
report, but just to state the items it is required to contain.
4.
Next stage
The Convenor will update the text and provide a 2WD to the MT by end of Q3 2014. This will be reviewed by
correspondence, such that a 1CD can be circulated and comments received prior to the next MT meeting. It
was agreed that a PWI should be registered now, and a Review Report (RR) circulated with the 1CD text.
5.
Review of stability dates for documents under MT 17
The current stability date for IEC 60942:2003 ‘Sound calibrators’ is 2014. It was decided to change this to
2016.
The current stability date for IEC 62585 "Methods to determine corrections to obtain the free-field response of
a sound level meter” is 2015. It was decided to leave this unchanged.
6.
Discussion of any new technologies or market requirements (as required by the SBP)
The increasing availability of silicon MEMS microphones was again discussed, with the expectation that it is
likely in the future they may be used in personal sound exposure meters and class 2 sound level meters.
Microphones of different non-standard geometries was also raised, and at present it was felt these
technologies are not sufficiently far advanced to make a decision on whether they will need to be included in
IEC 60942. So, for now it was therefore decided to keep a watching brief, but ensure that where possible
specifications do not prohibit their use.
7.
Any other business
a) Guidance Notes – no further Guidance Notes were requested at this time.
b) It was felt that many of the discussions in MT17 would be relevant for MT23, so Members were encouraged
to support MT23, including volunteering as a new member where possible.
c) It was noted that use of the IEC Collaboration Tools is not easy and can be quite confusing.
8.
Date and place of the next meeting
It was agreed that the next meeting of MT17 will be held in conjunction with the next Plenary meeting of TC 29,
currently expected in the later part of 2015.
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ANNEX I
DAY REPORT
from the meeting of IEC/TC 29/MT 19 "Revision of IEC 61260, Filters"
Thursday 20 February 2014
in Pretoria, South Africa
Participation
Members
Mr O-H Bjor
Mr I Bork
Mr K Cox
Mr F Marek
Mr R Nel
Mr M Ohya
Mr R Tyler
Convenor, Norway
Germany
United States of America
Denmark
South Africa
Japan
UK
Observers
Mr J Nhlapo (first part)
Mr S Kubeka (first part)
Mr T Groß (first part)
Ms S Dowson (first part)
South Africa
South Africa
Germany
UK
1.
Opening of the meeting
The meeting was opened at 09:00; members and observers were welcomed by the convenor.
2.
Roll call of members
The members and observers were presented. The convenor had received apologies for members not being
able to participate.
3.
Approval of the draft agenda
The revised draft agenda was reviewed and approved.
4.
Review of status of IEC 61260-1 "Electroacoustics – Octave-band and fractional-octave-band
filters – Part 1: Specifications"
The convenor informed the meeting that the document had been published less than a week before the
meeting. The report of the voting with comments was given in document 29_839b_RVD. Information was
given about the comments received and the decisions from the secretariat. In the transformation of the
document for circulation as FDIS, from the original MS word format to pdf, a number of formulas had been
misprinted. All editorial changes recommended by the secretariat have been made, except one printing error,
which was not changed correctly.
5.
Discussion of the comments on CD 61260-2 "Electroacoustics – Octave-band and fractionaloctave-band filters -– Part 2: Pattern evaluation tests" (doc. 29/830/CD)
The document had been circulated to National committees for comments before the meeting. The comments
were given in document 29/840/CC. MT19 reviewed the comments and decided to issue a revised document
for circulation as CDV. Some additional information related to uncertainty of measured will be provided by
members of MT 19 and added to the document as an additional informative annex. The updated document
will be circulated among the MT-members prior to circulation as CDV.
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Discussion of the comments on CD 61260-3 "Electroacoustics – Octave-band and fractionaloctave-band filters – Part 3: Periodic tests" (doc. 29/834/CD)
The document had been circulated for comments before the meeting. The comments were given in document
29/841/CC. MT19 reviewed the comments and decided to issue a revised document for circulation as CDV.
Some additional information related to uncertainty of measured will be provided by members of MT 19 and
added to the document as an additional informative annex. The updated document will be circulated among
the MT-members prior to circulation as CDV.
7.
Review of stability dates
The stability dates for IEC 61260 Ed. 1.0 (1995), IEC 61260 am1 Ed. 1.0 (2001) and IEC 61260-1(2014) were
reviewed, and the following dates were recommended:
• IEC 61260 (1995) and IEC 61260 am1 Ed. 1.0(2001) : 2014 if not withdrawn.
• IEC 61260-1(2014): 2017
8.
Discussion of any new technologies or market requirements
MT 19 foresees that the use of non-removable sensors, such as digital microphones, may require major
revisions in specification for octave-band and fractional-octave-band filters. MT 4 has started to analyse the
implication for pattern evaluation and periodic verification of sound level meters if they apply a digital
microphone as the acoustic transducer for measurements. MT 19 will wait for the result of this work.
9.
Any other business
No other matters were raised.
10.
Date and place for the next meeting of MT 19
It was assumed that the proposed work for the immediate future could be handled by e-mail correspondence.
Dependent of the outcome of the next stage for part 2 and part 3, the convenor will call a meeting.
11.
Closing of the meeting
The convenor thanked the members of the team for their contributions. The meeting was closed 14:15.
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ANNEX J
Report to TC 29 meeting, February 2014 in Pretoria
from IEC/TC 29/MT 20 "Revision of IEC 60118-4, Induction loop systems"
MT 20 has not met since September 2012, but a meeting is planned for later in 2014.
Projects:
IEC 60118-4 Revision: This has been progressed by correspondence and the FDIS text is presently
in process for FDIS circulation. The FDIS will be circulated later this year.
After the fairly rapid changes in this standard over the last few years, a period of greater stability is
expected, but the work is by no means entirely complete.
Future work: Further improvements in the standard can be expected.
Conny Andersson
Convenor of MT 20
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ANNEX K
DAY REPORT
from the meeting of IEC/TC 29/WG 21 "Head and ear simulators"
Tuesday 18 February 2014 in Pretoria, South Africa
Participation
Members:
Mr T Fedtke
Mr R Barham
Mr Y Fujisaka
Mr S Jønsson
Mr E Laukli
Mr M Nilsson
Mr U Richter
Convenor, Germany
UK
Japan
Denmark
Norway (afternoon meeting)
Denmark
Germany (morning meeting, via internet conference tool)
Liaison ITU-T/SG12:
Mr L B Nielsen
Denmark (morning meeting, via internet conference tool)
Observers:
Mr R Grason
Mr J Nhlapo
Mr C M Walber
USA
South Africa
USA
The meeting was opened at 9:00 a.m. and the members and observers were welcomed by the convenor.
Apologies were received from Mr S Barrera-Figueroa, Denmark, Mr H.-W. Gierlich, Germany and
Mr E Nielsen, Denmark.
1.
Agenda
The draft agenda was modified in order to allow the project leader for IEC/TS 60318-7 revision to take part in
the discussion during a predetermined time slot (10 a.m. to 12 a.m.).
The modified agenda was approved by the WG.
2.
WD for Guide IEC 60318-X "Electroacoustics – Simulators of human head and ear – Part X:
Guide to the intended use of ear simulators"
Project leader: Richard Barham
A 2WD for the guide, which is intended as a help for users of head and ear simulators in various fields of
application, e.g. audiological purposes, telecommunication, audio engineering and hearing protection, was
presented by the project leader.
It will be circulated for review to specialists in the different application fields. The revised document will then
be circulated for comments within the WG by June 2014. The preparation of a CD is expected by September
2014.
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IEC 60318-7 revision "Electroacoustics – Simulators of human head and ear – Part 7: Head and
torso simulator for the measurement of air-conduction hearing aids"
Project leader: Utz Richter
The comments received on DC (doc. 29/831DC) were discussed in the WG meeting, based on a preprocessed document prepared by the project leader, WG21(Richter)N075. All comments were resolved during
the meeting.
A draft Annex E on 3D CAD data with example pinna simulators was presented by Richard Barham. WG21
expects the Annex E to be completed by end of March 2014. A last WD will then be circulated within the WG
for comments by June 2014. Based on these results, a 1CD is expected to be sent to the TC 29 secretariat
by August 2014.
4.
Revision of IEC 60318-3 "Electroacoustics – Simulators of human head and ear – Part 3:
Acoustic coupler for the calibration of supra-aural earphones used in audiometry”
Project leader: Thomas Fedtke
The result of voting on the CDV (doc. 29/811/RVC) reported no negative votes. Since during the discussion of
the document all comments were resolved, WG21 decided to go directly for an IS. The project leader will
prepare the IS layout based and the results of the discussion. WG21 expects the IS layout to be submitted to
the TC 29 secretariat by May 2014.
5.
Review of Stability Periods for WG21 documents
The stability dates for the documents in the IEC 60318 series were established as follows:
IEC
IEC
IEC
IEC
IEC
IEC/TS
6.
60318-1
60318-3
60318-4
60318-5
60318-6
60318-7
Proposed new stability date
2017
2017
2017
2017
2015
2014
New requirements of future needs
The convenor informed the WG on the progress in the EURAMET EARS project (Metrology for a universal ear
simulator and the perception of non-audible sound) and encouraged the members to follow the updates online (http://www.ptb.de/emrp/ears-home.html). The outcome of the project is expected to contribute to the
standardization activities of WG21.
WG21 follows the development in WG13 (Hearing aids) regarding the coupler for the measurement of
frequency characteristics of hearing aids. WG21 is prepared to take over the project as soon as an IS for the
coupler is the target.
7.
Date and place of next meeting
It was agreed that the proposed work for the immediate future could be handled by correspondence.
The next meeting of WG21 will therefore most probably be held in conjunction with the next TC29 meeting.
The meeting was closed at 4:40 p.m.
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ANNEX L
Report to TC 29 meeting, February 2014 in Pretoria
from IEC/TC 29/WG 22 "Audio-frequency induction-loop systems and equipment for
assisted hearing"
WG 22 has not met since September 2012, but a meeting is planned for later in 2014.
Projects:
IEC 62489-1 Amendment 1: This has been progressed by correspondence and is in process for
FDIS circulation. The FDIS will be circulated later this year.
IEC 62489-2 Revision: This has also been progressed by correspondence and is in process for
FDIS circulation. The FDIS will be circulated later this year.
This standard has come to the attention of IEC/TC 106. It cannot be predicted whether TC 106 will
make significant criticisms of it, but it is not believed that any serious criticism is justified.
After the fairly rapid changes in these standards over the last few years, a period of greater stability
is expected, but the work on IEC 62489-1 is by no means entirely complete.
Proposed TR on general recommendations for audio-frequency induction-loop systems:
Progress on this project has been slow, but WG members have indicated that they definitely want to
continue the project. This will be a major topic for discussion at the next WG meeting.
Future work: Apart from the work on the proposed TR, further improvements in IEC 62489-1 can be
expected.
John Woodgate
Convenor of WG 22
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ANNEX M
STRATEGIC BUSINESS PLAN (SBP)
®
IEC/TC or SC
29
Approved in Pretoria, South Africa, February 2014
Secretariat
DK
Date
2014-02
Please ensure this form is annexed to the Report to the Standardization Management Board if it has been prepared during a meeting, or
sent to the Central Office promptly after its contents have been agreed by the committee.
Title of TC
Electroacoustics
A
Background
A.1 Date of establishment of the Technical Committee and a brief historical background
IEC/TC 29 was established in 1953 following the first International Congress on Acoustics in 1953 in Delft,
Netherlands at which the urgent need for international standardization in electroacoustics was recognised, and
at which some topics were discussed in detail and some working draft documents produced. These were
completed at the first meetings of TC 29 in the Hague, Netherlands in 1953, in Philadelphia, USA in 1954, and in
Bern, Switzerland in 1955, and published as IEC 89, Recommendations for the characteristics of audioapparatus to be specified for application purposes (1957), and IEC 90 Recommendations for the dimensions of
polarized plugs for hearing aids (1957).
Terminology, sound level meters, hearing aids, electroacoustics, electromechanical and electroacoustical
transducers as well as ultrasonics were also included in the initial broad scope of the Committee.
Standardisation of the description and the measurement of vibration, including transducers, was transferred to
ISO at an early stage.
The Committee was subsequently organized into four Subcommittees, SC 29A, SC 29B, SC 29C and SC 29D
as follows:
SC 29A. The working group for ‘Sound recording’ was transferred into SC 29A and was later to become a
separate Committee - TC 60 "Recording".
SC 29B "Audio engineering" was formed in 1966 and in 1984 merged with SC 60C to become TC 84 (in
November 1995 this transformed into SC 100C "Equipment and systems in the field of audio, video and
audiovisual engineering").
SC 29C covered “Measuring devices” and SC 29D “Ultrasound”.
In 1985 SC 29D "Ultrasound" became IEC/TC 87 "Ultrasonics". At the same time TC 29 and SC 29C were
amalgamated to form the new TC 29 with the purpose of preparing international standards related to instruments
and methods of measurement for electroacoustical purposes.
A.2 Current title and scope
Title
Electroacoustics.
Scope
Standardization of instruments and methods of measurement in the field of electroacoustics. This includes
performance requirements, calibration and test methods for electroacoustic transducers (e.g. microphones,
sound calibrators, filters, earphones, bone vibrators), sound measuring instruments (e.g. sound level meters),
audiometric equipment as well as hearing aids and induction loop systems, and equipment used for
measurement of aircraft noise.
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Excluded are:
a) standards for sound and video recording as dealt with by TC 100;
b) standards for equipment in the field of audio and audio- visual engineering as dealt with by TC 100;
c) standards and terminology for ultrasonic techniques dealt with by TC 87.
NOTE - Close co-operation is, however, be maintained with TC 87 in the fields of common interest.
B
B.1
Business Environment
General
TC 29's technical work plays a vital role in underpinning large areas of social, environmental, medical and
rehabilitation work, which requires the accurate production, and measurement of sound. Acoustical
instrumentation and devices are therefore required by a very diverse range of users.
The declaration and verification of noise emission values for all kinds of machinery as presently required by
many national or regional regulations presupposes the use of uniformly specified and sophisticated sound
measuring instrumentation with tight tolerances.
A major change in the business environment has been the rapid growth of telephone retailing, banking and
information provision. Such development has created a demand for the use and development of TC 29
standards in determining the acoustic environment in which these businesses operate.
For the control of noise immission there is a growing need for instrumentation for the measurement and analysis
of noise exposure in the work place as well as in residential areas, and within the entertainment sector. The
available instruments and measuring methods still represent a high degree of simplification compared to the
perception of noise by man and to the effect on the human ear. However, current instrumentation provides a
consistent means of measurement, which allows preventative action to be taken where appropriate based on the
best available data.
Regulation and law on acoustical instrumentation differs widely from country to country. For example, in some
countries pattern evaluation of new models of instrument against the international standard is required before the
device can be sold, and regular testing of individual specimens is also required by law. In other countries this is
not the case and it is up to the user to follow good measurement practice. Hence the aim of TC29 is also to
encourage testing in countries where it is not mandated by use of the same agreed international specified test
methods within all countries, ensuring consistency and cost-effective testing across world markets.
In terms of worldwide market this varies considerably for the different instruments within the scope of the
Committee’s remit, and as the number of key manufacturers in some areas is quite small, data on sales is
often not available for commercial reasons. However, as examples some 8 million hearing aids are
manufactured worldwide each year, and it is known that in some countries lost productivity due to noise can
equate to up to approximately 2% of GDP.
B.2
Market demand
The demand for acoustical devices and measurement is worldwide, with many applications and stakeholders,
and in many countries the control and measurement of noise is covered by law or legislative directives.
The range of users of the standards will include governments, local authorities, planners, the medical profession,
manufacturers of acoustical devices, those measuring environmental noise, consultants as well as the many
laboratories and test houses around the world.
Users of TC 29 standards include international and national standards organizations, and in many countries
the international standards are directly adopted with no change as equivalent national standards.
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29/844/RM
As an example, up to 170 million citizens in the EU alone are said to be living in areas where the noise levels
were such as to cause serious annoyance during daytime. Also, reports from some countries found that some
30% of the population are highly disturbed by road traffic noise. Measures to be taken to reduce the noise are
normally very expensive and must be based on proven facts. Similarly ability to make reliable measurement of
aircraft noise is vital to the industries concerned, airport operators and the general population.
Noise induced hearing impairment is one of the most frequent occupational hazards resulting in large social
expense. Equipment for the measurement and analysis of noise as covered by TC 29, is in high demand and
allows facts to be gathered based on accurate and reproducible measurements. Worldwide research in
psychoacoustics is aiming at a better understanding of human reactions to noise exposure that certainly will call
for further development of measuring techniques and instrumentation. Monitoring of hearing functions with
improved audiometric equipment may contribute to an early detection and the minimizing of related risks.
Hearing aid performance, specification and measurement is the subject of a series of standards produced by TC
29. The associated standardization of ear simulators and head and torso simulators for measuring performance
has allowed a better understanding to be found of the relationship between subjective and objective
measurements. The effect of these standards has been to improve the means by which the vast majority of hard
of hearing people communicate, and so improve their quality of life.
The ability to accurately measure the threshold of hearing is crucial to hearing conservation programmes, the
early detection of hearing loss in children and the diagnosis of hearing loss. TC 29 works in conjunction with
ISO/TC 43 to ensure that standards for thresholds of hearing and other techniques for audiometry are integrated.
The same close cooperation also takes place on the integration of measurement methods and the necessary
instrumentation for determination of acoustic power emission from machinery, total noise exposure of workers
during a work day, etc.
B.3
Trends in technology
The current rapid development in digital measurement, manufacturing techniques and miniaturisation offers
increased capabilities and more sophistication in sound measuring instrumentation in general, and for
audiometry and hearing aids. The advent of automated methods of testing and calibration also have a key role to
play, and newer digital designs may mean that in practice reduced test procedures are appropriate. Hence the
international standards require continuous revision and updating to ensure specifications and test procedures
remain appropriate and fit-for-purpose.
New technologies are continually evolving, for example in terms of hearing aids and microphones, and the
Committee needs to ensure that as time progresses the standardisation keeps pace with the new products and
systems introduced.
B.4
Market trends
Market trends are broadly in line with the technology trends mentioned in B.3, which is often allowing greater
flexibility, more customisation and enhanced functionality of device, whilst maintaining a static cost base.
Similarly miniaturisation in hearing aids and other areas has progressed considerably over recent years, and
although some further change may occur the usability of devices will continue to be a key factor. TC 29 has
liaisons with relevant TCs and these are unlikely to change substantially as TC29 only provides specifications
of measurement performance.
B.5
Ecological environment
This is not directly relevant as TC 29 standards specify only measurement performance requirements,
although impact of manufacture and disposal on the environment will be of interest to manufacturers using the
standards.
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29/844/RM
System approach aspects
TC 29 will actively continue to promote the ongoing liaisons to other committees and to system committees
where relevant.
Systems committees
(TC 29 as a supplier
of standards)
Systems committees
(TC 29 as a customer
of standards)
TC 62
TC 87
TC 100
TC 108
ISO/TC 43
ISO/TC 43/SC 1
ISO/TC 108/SC 3
SC 77B
TC 87
TC 100
TC 106
TC 108
Electrical equipment in medical practice
Ultrasonics
Audio, video and multimedia systems and equipment
Safety of electronic equipment within the field of
audio/video, information technology and communication
technology
Acoustics
Noise
Use and calibration of vibration and shock measuring
instruments
High frequency phenomena
Ultrasonics
Audio, video and multimedia systems and equipment
Methods for the assessment of electric, magnetic and
electromagnetic fields associated with human exposure
Safety of electronic equipment within the field of
audio/video, information technology and communication
technology
Cooperation established:
•
Through liaison with the following international organisations:
o
o
o
D
ITU-T "International Telecommunication Union – Telecommunication Standardization Sector"
OIML "International Organization Of Legal Metrology"
ICAO "International Civil Aviation Organization"
•
Through experts working on other TCs or with other bodies e.g. TC 106, ISO/TC 43, OIML, ICAO
•
Previous experience of joint WG with ISO/TC 43.
Objectives and strategies (3 to 5 years)
D.1 Objectives
1. To keep TC 29 standards up-to-date to reflect new/changing technologies and user requirements both
in the marketplace and via customer IEC and ISO Technical Committees.
2. Respond to requests for development of new standards to meet new marketplace and business
needs and environmental noise protection concerns following IEC guidelines in a timely manner.
3. Ensure consistency within TC 29 standards on common aspects e.g. uncertainties of measurement
and ensure the standards are written in such a way that requirements are clear to end-users.
4. Promote the work of the committee and increase the awareness of TC 29 publications.
5. Encourage new membership of the Committee.
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D.2 Strategies
1. Continue regular reviews of the Stability Dates for each standard and ensure a comprehensive review
of the options available for each.
2. Raise early awareness of new technologies or market requirements, likely to have an impact on
existing standards or likely to trigger NWIPs, by using WG and MT members expert knowledge to
identify.
3. Identify any additional guidance documents that would be useful to Convenors/Project Leaders on
common aspects, clarity of wording or Committee decisions.
4. Discuss with IEC Central Office marketing staff effective methods to increase awareness of the work
of TC 29 and of its publications. Encourage experts to perform a similar task at National Committee
level.
E
Action plan
1. Maintain current record of Stability Dates, including a list in WG/MT order to ease identification of
those due for review in the immediate future. In advance of plenary meetings, Convenors/Project
Leaders to review and add relevant documents to their WG/MT Agendas to ensure members have an
opportunity to consider requirement for revision prior to WG/MT meeting. Initiate RR forms as
appropriate.
2. Agendas to include an item for discussion on new technologies or market requirements likely to
impact the work of the Committee. Convenors/Project Leaders to document, and initiate RR or NP as
appropriate.
3. Guidance documents – need for additional documents to be reviewed at each plenary meeting.
Convenors/Project Leaders to suggest any further documents required. Ongoing from 2015.
4. Raise awareness of new and revised standards, and the work of TC 29, through internationally and
nationally available channels such as professional bodies, conferences and journal papers. All
Members. Ongoing from 2014.
F
Useful links to IEC website
The TC home page gives access to membership, TC/SC Officers, scope, liaisons, WG/MT/PT structure,
publications issued and work and maintenance programmes and similar information for SCs, if any.
Name or signature of the secretary
Leif Nielsen
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ANNEX N
Approved IEC/TC 29 Stability Dates
Publication Number
IEC 61252 am1 Ed. 1.0
IEC 61252 Ed. 1.1.0
IEC 61672-1 Ed. 1.0
IEC 61672-2 Ed. 1.0
IEC 61672-3 Ed. 1.0
IEC 61094-1 Ed. 2.0
IEC 61094-2 Ed. 2.0
IEC 61094-3 Ed. 1.0
IEC 61094-4 Ed. 1.0
IEC 61094-5 Ed. 1.0
IEC 61094-6 Ed. 1.0
IEC 61094-8 Ed. 1.0
IEC/TS 61094-7 Ed. 1.0
IEC 60645-1 Ed. 3.0
IEC 60645-2 Ed. 1.0
IEC 60645-3 Ed. 2.0
IEC 60645-5 Ed. 1.0
IEC 60645-6 Ed. 1.0
IEC 60645-7 Ed. 1.0
IEC 60118-0 am1 Ed. 2.0
IEC 60118-0 Ed. 2.0
IEC 60118-01 Ed. 3.1
IEC 60118-02 am1 Ed. 2.0
IEC 60118-02 am2 Ed. 2.0
IEC 60118-02 Ed. 2.0
IEC 60118-05 Ed. 1.0
IEC 60118-06 Ed. 2.0
IEC 60118-07 Ed. 2.0
IEC 60118-08 Ed. 2.0
IEC 60118-09 Ed. 1.0
IEC 60118-12 Ed. 1.0
IEC 60118-13 Ed. 3.0
IEC 60118-15 Ed.1.0
IEC 61669 Ed. 1.0
IEC 60601-2-66 Ed. 1.0
IEC 60942 Ed. 3.0
IEC 62585 Ed. 1.0
IEC/TS 62370 Ed. 1.0
IEC 61260 am1 Ed. 1.0
IEC 61260 Ed. 1.0
IEC 61260-1 Ed. 1.0
IEC 60118-4 Ed. 2.0
IEC 60318-1 Ed. 2.0
IEC 60318-3 Ed. 1.0
IEC 60318-4 Ed. 1.0
IEC 60318-5 Ed. 1.0
IEC 60318-6 Ed. 1.0
IEC/TS 60318-7 Ed. 1.0
IEC 62489-1 Ed. 1.0
IEC 62489-2 Ed. 1.0
IEC 61265 Ed. 1.0
IEC 60118-14 Ed. 1.0
IEC 60263 Ed. 3.0
IEC 61012 Ed. 1.0
IEC 61043 Ed. 1.0
IEC 61183 Ed. 1.0
Publication
Date
2000-10-09
2002-03-12
2002-05-29
2003-04-16
2006-10-25
2000-07-20
2009-02-20
1995-11-16
1995-11-16
2001-10-16
2004-11-10
2012-09-19
2006-05-22
2012-02-16
1993-11-11
2007-03-20
2004-11-23
2009-04-29
2009-04-29
1994-01-20
1983-01-01
1999-01-21
1993-02-15
1997-05-16
1983-01-01
1983-01-01
1999-06-09
2005-10-21
2005-10-19
1985-01-01
1996-10-09
2011-04-11
2012-02-21
2001-01-30
2012-10-02
2003-01-30
2012-07-25
2004-05-10
2001-09-27
1995-08-08
2014-02-14
2006-10-27
2009-08-31
1998-08-07
2010-01-21
2006-08-16
2007-11-27
2011-02-24
2010-01-27
2011-01-26
1995-04-13
1998-02-19
1982-01-01
1990-01-31
1993-11-30
1994-06-07
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