EN 60318-3:2015

SLOVENSKI STANDARD
01-september-2015
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Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the
calibration of supra-aural earphones used in audiometry
Elektroakustik - Simulatoren des menschlichen Kopfes und Ohres - Teil 3: Akustischer
Kuppler zur Kalibrierung von supra-auralen Audiometrie-Kopfhörern
Electroacoustique - Simulateurs de tête et d'oreille humaines - Partie 3: Coupleur
acoustique pour l'étalonnage des écouteurs supra-auraux utilisés en audiométrie
Ta slovenski standard je istoveten z: EN 60318-3:2015
ICS:
13.140 Vpliv hrupa na ljudi Noise with respect to human
beings
17.140.50 Elektroakustika Electroacoustics
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

EUROPEAN STANDARD EN 60318-3
NORME EUROPÉENNE
EUROPÄISCHE NORM
February 2015
ICS 17.140.50 Supersedes EN 60318-3:1998
English Version
Electroacoustics - Simulators of human head and ear - Part 3:
Acoustic coupler for the calibration of supra-aural earphones
used in audiometry
(IEC 60318-3:2014)
Électroacoustique - Simulateurs de tête et d'oreille Akustik - Simulatoren des menschlichen Kopfes und Ohres
humaines - Partie 3: Coupleur acoustique pour l'étalonnage - Teil 3: Akustischer Kuppler zur Kalibrierung von supra-
des écouteurs supra-auraux utilisés en audiométrie auralen Audiometrie-Kopfhörern
(IEC 60318-3:2014) (IEC 60318-3:2014)
This European Standard was approved by CENELEC on 2015-01-15. CENELEC members are bound to comply with the CEN/CENELEC
Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration.
Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN-CENELEC
Management Centre or to any CENELEC member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation
under the responsibility of a CENELEC member into its own language and notified to the CEN-CENELEC Management Centre has the
same status as the official versions.
CENELEC members are the national electrotechnical committees of Austria, Belgium, Bulgaria, Croatia, Cyprus, the Czech Republic,
Denmark, Estonia, Finland, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland,
Turkey and the United Kingdom.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Avenue Marnix 17, B-1000 Brussels
© 2015 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Ref. No. EN 60318-3:2015 E
Foreword
The text of document 29/796/CDV, future edition 2 of IEC 60318-3, prepared by IEC TC 29,
Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as
The following dates are fixed:
(dop) 2015-10-15
• latest date by which the document has
to be implemented at national level by
publication of an identical national
standard or by endorsement
(dow) 2018-01-15
• latest date by which the national
standards conflicting with the
document have to be withdrawn
This document supersedes EN 60318-3:1998.

Attention is drawn to the possibility that some of the elements of this document may be the subject of
patent rights. CENELEC [and/or CEN] shall not be held responsible for identifying any or all such patent
rights.
Endorsement notice
The text of the International Standard IEC 60318-3:2014 was approved by CENELEC as a European
Standard without any modification.
In the official version, for Bibliography, the following note has to be added for the standard indicated :
IEC 61094-4 NOTE Harmonised as EN 61094-4.

- 3 - EN 60318-3:2015
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following documents, in whole or in part, are normatively referenced in this document and are
indispensable for its application. For dated references, only the edition cited applies. For undated
references, the latest edition of the referenced document (including any amendments) applies.

NOTE 1 When an International Publication has been modified by common modifications, indicated by (mod), the relevant EN/HD
applies.
NOTE 2 Up-to-date information on the latest versions of the European Standards listed in this annex is available here:
www.cenelec.eu.
Publication Year Title EN/HD Year

IEC 61094-1 -  Measurement microphones - EN 61094-1 -
Part 1: Specifications for laboratory standard
microphones
ISO/IEC Guide 98-3 -  Uncertainty of measurement - - -
Part 3: Guide to the expression of
uncertainty in measurement (GUM:1995)

IEC 60318-3 ®
Edition 2.0 2014-12
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Simulators of human head and ear –

Part 3: Acoustic coupler for the calibration of supra-aural earphones used

in audiometry
Électroacoustique – Simulateurs de tête et d'oreille humaines –

Partie 3: Coupleur acoustique pour l’étalonnage des écouteurs supra-auraux

utilisés en audiométrie
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
CODE PRIX M
ICS 17.140.50 ISBN 978-2-8322-1930-0

– 2 – IEC 60318-3:2014  IEC 2014
CONTENTS
FOREWORD . 3
1 Scope . 5
2 Normative references . 5
3 Terms and definitions . 5
4 Construction . 5
4.1 General . 5
4.2 Cavity dimensions . 6
4.3 Static pressure equalization . 8
4.4 Calibrated pressure type microphone . 8
5 Coupling of earphone to acoustic coupler . 9
6 Calibration . 9
6.1 Reference environmental conditions . 9
6.2 Method of calibration . 10
7 Maximum permitted uncertainty of measurements . 10
Bibliography . 12

Figure 1 – Dimensions of acoustic coupler . 7
Figure 2 – Coupling of earphone to coupler. 9

Table 1 – Height of the coupler as a function of the acoustic volume of the microphone . 8
Table 2 – Values of maximum permitted uncertainties U for a level of confidence of
max
approximately 95 % . 11

IEC 60318-3:2014  IEC 2014 – 3 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
SIMULATORS OF HUMAN HEAD AND EAR –

Part 3: Acoustic coupler for the calibration
of supra-aural earphones used in audiometry

FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
this end and in addition to other activities, IEC publishes International Standards, Technical Specifications,
Technical Reports, Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC
Publication(s)”). Their preparation is entrusted to technical committees; any IEC National Committee interested
in the subject dealt with may participate in this preparatory work. International, governmental and non-
governmental organizations liaising with the IEC also participate in this preparation. IEC collaborates closely
with the International Organization for Standardization (ISO) in accordance with conditions determined by
agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
Committees in that sense. While all reasonable efforts are made to ensure that the technical content of IEC
Publications is accurate, IEC cannot be held responsible for the way in which they are used or for any
misinterpretation by any end user.
4) In order to promote international uniformity, IEC National Committees undertake to apply IEC Publications
transparently to the maximum extent possible in their national and regional publications. Any divergence
between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
the latter.
5) IEC itself does not provide any attestation of conformity. Independent certification bodies provide conformity
assessment services and, in some areas, access to IEC marks of conformity. IEC is not responsible for any
services carried out by independent certification bodies.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60318-3 has been prepared by IEC technical committee 29:
Electroacoustics.
This second edition cancels and replaces the first edition published in 1998 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) adjustment of terms and wording to the other parts of IEC 60318,
b) introduction of maximum permitted uncertainties,
c) revised requirements for static pressure equalization.

– 4 – IEC 60318-3:2014  IEC 2014
The text of this standard is based on the following documents:
CDV Report on voting
29/796/CDV 29/811A/RVC
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.
A list of all the parts in the IEC 60318 series, published under the general title
Electroacoustics – Simulators of human head and ear can be found on the IEC website.
The committee has decided that the contents of this publication will remain unchanged until
the stability date indicated on the IEC web site under "http://webstore.iec.ch" in the data
related to the specific publication. At this date, the publication will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
IEC 60318-3:2014  IEC 2014 – 5 –
ELECTROACOUSTICS –
SIMULATORS OF HUMAN HEAD AND EAR –

Part 3: Acoustic coupler for the calibration
of supra-aural earphones used in audiometry

1 Scope
This part of IEC 60318 specifies an acoustic coupler for the measurement of supra-aural
audiometric earphones in the frequency range from 125 Hz to 8 000 Hz.
The sound pressure developed by an earphone is not, in general, the
...