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

This part of IEC 60318 describes an acoustic coupler for loading an earphone or hearing aid with a specified acoustic impedance when determining its physical performance characteristics, in the frequency range 125 Hz to 8 kHz. It is suitable for air conduction hearing aids and earphones, coupled to the ear by means of ear inserts e.g. ear moulds or similar devices. The sound pressure developed by an earphone is not, in general, the same in the coupler as in a person's ear. However, it can be used as a simple and ready means for the exchange of specifications and of physical data on hearing aids and for the calibration of specified insert earphones used in audiometry.

Akustik - Simulatoren des menschlichen Kopfes und Ohres - Teil 5: 2-cm³-Kuppler zur Messung von mittels Ohreinsätzen angekoppelten Hörgeräten und Ohrhörern

Electroacoustique - Simulateurs de tête et d'oreille humaines -- Partie 5: Coupleur de 2 cm³ pour la mesure des appareils de correction auditive et des écouteurs couplés à l'oreille par des embouts

Décrit un coupleur acoustique destiné à adapter un écouteur ou un appareil de correction auditive avec une impédance acoustique spécifiée dans le domaine des fréquences comprises entre 125 Hz et 8 kHz, lors de la détermination de ses caractéristiques physiques. Elle s'applique aux appareils de correction auditive à conduction aérienne et aux écouteurs couplés à l'oreille au moyen d'embouts d'oreille, par exemple embouts moulés ou dispositifs similaires.  La pression acoustique produite par un écouteur n'est généralement pas la même dans le coupleur et dans une oreille humaine. Cependant elle peut être utilisée en tant que moyen simple et immédiat pour l'échange de spécifications et de données physiques concernant les appareils de correction auditive et pour l'étalonnage des écouteurs à embout spécifiés utilisés en audiométrie. Cette première édition de la CEI 60318-5 annule et remplace la CEI 60126:1973.

Elektroakustika - Simulatorji človeške glave in ušes - 5. del: 2 cm3-ski spojni element za meritve slušnih pripomočkov in ušesnih slušalk, spojenih z ušesom s pomočjo ušesnih vstavkov (IEC 60318-5:2006)

General Information

Status
Published
Publication Date
31-Dec-2006
Technical Committee
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
01-Jan-2007
Due Date
01-Jan-2007
Completion Date
01-Jan-2007

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---------------------- Page: 1 ----------------------
EUROPEAN STANDARD
EN 60318-5
NORME EUROPÉENNE
September 2006
EUROPÄISCHE NORM
ICS 17.140.50
English version
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 60318-5:2006)
Electroacoustique - Akustik -
Simulateurs de tête et d'oreille humaines Simulatoren des menschlichen Kopfes
Partie 5: Coupleur de 2 cm³ und Ohres
pour la mesure des appareils de Teil 5: 2-ccm-Kuppler zur Messung
von mittels Ohreinsätzen angekoppelten
correction auditive et des écouteurs
couplés à l'oreille par des embouts Hörgeräten und Ohrhörern
(CEI 60318-5:2006) (IEC 60318-5:2006)

This European Standard was approved by CENELEC on 2006-09-01. 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 Central Secretariat 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 Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech

Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,

Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,

Sweden, Switzerland and the United Kingdom.
CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.

Ref. No. EN 60318-5:2006 E
---------------------- Page: 2 ----------------------
EN 60318-5:2006 - 2 -
Foreword

The text of document 29/600/FDIS, future edition 1 of IEC 60318-5, prepared by IEC TC 29,

Electroacoustics, was submitted to the IEC-CENELEC parallel vote and was approved by CENELEC as

EN 60318-5 on 2006-09-01.
The following dates were fixed:
– latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-06-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-09-01
Annex ZA has been added by CENELEC.
__________
Endorsement notice

The text of the International Standard IEC 60318-5:2006 was approved by CENELEC as a European

Standard without any modification.

In the official version, for Bibliography, the following notes have to be added for the standards indicated:

IEC 60118-7 NOTE Harmonized as EN 60118-7:2005 (not modified).
IEC 61094-1 NOTE Harmonized as EN 61094-1:1994 (not modified).
__________
---------------------- Page: 3 ----------------------
- 3 - EN 60318-5:2006
Annex ZA
(normative)
Normative references to international publications
with their corresponding European publications

The following referenced documents are indispensable for the application of this document. For dated

references, only the edition cited applies. For undated references, the latest edition of the referenced

document (including any amendments) applies.

NOTE When an international publication has been modified by common modifications, indicated by (mod), the relevant EN/HD

applies.
Publication Year Title EN/HD Year
1) 2)
IEC 61094-4 - Measurement microphones EN 61094-4 1995
Part 4: Specifications for working standard
microphones
1) 2)
ISO 389-2 - Acoustics - Reference zero for the calibration EN ISO 389-2 1996
of audiometric equipment
Part 2: Reference equivalent threshold sound
pressure levels for pure tones and insert
earphones
BIPM/IEC/ISO/ 1995 Guide to the expression of uncertainty in - -
IUPAC/OIML measurement (GUM)
Undated reference.
Valid edition at date of issue.
---------------------- Page: 4 ----------------------
NORME CEI
INTERNATIONALE
IEC
60318-5
INTERNATIONAL
Première édition
STANDARD
First edition
2006-08
Électroacoustique –
Simulateurs de tête et d’oreille humaines –
Partie 5:
Coupleur de 2 cm pour la mesure des appareils
de correction auditive et des écouteurs couplés
à l’oreille par des embouts
Electroacoustics –
Simulators of human head and ear –
Part 5:
2 cm coupler for the measurement of hearing
aids and earphones coupled to the ear by means
of ear inserts
 IEC 2006 Droits de reproduction réservés  Copyright - all rights reserved

Aucune partie de cette publication ne peut être reproduite ni No part of this publication may be reproduced or utilized in any

utilisée sous quelque forme que ce soit et par aucun procédé, form or by any means, electronic or mechanical, including

électronique ou mécanique, y compris la photocopie et les photocopying and microfilm, without permission in writing from

microfilms, sans l'accord écrit de l'éditeur. the publisher.

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Telephone: +41 22 919 02 11 Telefax: +41 22 919 03 00 E-mail: inmail@iec.ch Web: www.iec.ch

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МеждународнаяЭлектротехническаяКомиссия
Pour prix, voir catalogue en vigueur
For price, see current catalogue
---------------------- Page: 5 ----------------------
60318-5  IEC:2006 – 3 –
CONTENTS

FOREWORD...........................................................................................................................5

1 Scope...............................................................................................................................9

2 Normative references .......................................................................................................9

3 Terms and definitions .......................................................................................................9

4 Construction ...................................................................................................................11

4.1 General .................................................................................................................11

4.2 Cavity dimensions .................................................................................................11

4.3 Calibrated pressure type microphone ....................................................................11

4.4 Static pressure equalisation ..................................................................................13

5 Calibration......................................................................................................................13

5.1 Reference environmental conditions......................................................................13

5.2 Calibration procedure ............................................................................................13

6 Coupling of earphones and hearing aids to the coupler ..................................................15

6.1 Audiometers with insert earphones........................................................................15

6.2 Hearing aids of the in-the-ear type ........................................................................15

6.3 Hearing aids with insert earphone .........................................................................15

6.4 Hearing aids of the behind-the-ear type and spectacle hearing aids ......................21

7 Maximum permitted expanded uncertainty of measurements ..........................................25

Bibliography..........................................................................................................................27

---------------------- Page: 6 ----------------------
60318-5  IEC:2006 – 5 –
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
SIMULATORS OF HUMAN HEAD AND EAR –
Part 5: 2 cm coupler for the measurement of hearing aids and
earphones coupled to the ear by means of ear inserts
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 provides no marking procedure to indicate its approval and cannot be rendered responsible for any

equipment declared to be in conformity with an IEC Publication.

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 60318-5 has been prepared by IEC technical committee 29:

Electroacoustics.
This first edition of IEC 60318-5 cancels and replaces IEC 60126:1973.
The text of this standard is based on the following documents:
FDIS Report on voting
29/600/FDIS 29/606/RVD

Full information on the voting for the approval of this standard can be found in the report on

voting indicated in the above table.
---------------------- Page: 7 ----------------------
60318-5  IEC:2006 – 7 –

This publication has been drafted in accordance with the ISO/IEC Directives, Part 2.

A list of all parts of 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 maintenance result 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.
---------------------- Page: 8 ----------------------
60318-5  IEC:2006 – 9 –
ELECTROACOUSTICS –
SIMULATORS OF HUMAN HEAD AND EAR –
Part 5: 2 cm coupler for the measurement of hearing aids and earphones
coupled to the ear by means of ear inserts
1 Scope

This part of IEC 60318 describes an acoustic coupler for loading an earphone or hearing aid

with a specified acoustic impedance when determining its physical performance character-

istics, in the frequency range 125 Hz to 8 kHz. It is suitable for air conduction hearing aids

and earphones, coupled to the ear by means of ear inserts e.g. ear moulds or similar devices.

The sound pressure developed by an earphone is not, in general, the same in the coupler as

in a person’s ear. However, it can be used as a simple and ready means for the exchange of

specifications and of physical data on hearing aids and for the calibration of specified insert

earphones used in audiometry.
2 Normative references

The following referenced documents are indispensable for the application of this document.

For dated references, only the edition cited applies. For undated references, the latest edition

of the referenced document (including any amendments) applies.

IEC 61094-4, Measurement microphones – Part 4: Specifications for working standard

microphones

ISO 389-2, Acoustics – Reference zero for the calibration of audiometric equipment – Part 2:

Reference equivalent threshold sound pressure levels for pure tones and insert earphones

BIPM/IEC/ISO/IUPAC/IUPAP/OIML:1995, Guide to the expression of uncertainty in
measurement (GUM)
3 Terms and definitions

For the purposes of this part of IEC 60318, the following terms and definitions apply:

3.1
acoustic coupler

cavity of predetermined shape and volume which is used for the calibration of an earphone in

conjunction with a microphone to measure the sound pressure developed within the cavity

3.2
effective volume
equivalent volume of air of the acoustical compl
...

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