Hearing aids - Part 3: Hearing aid equipment not entirely worn on the listener

Describes a method of determining the overall electro-acoustical performance of hearing aid equipment used in the rehabilitation of persons having impaired hearing.

Hörgeräte - Teil 3: Hörhilfen-Systeme, die nur zum Teil vom Benutzer getragen werden

Appareils de correction auditive - Partie 3: Systèmes de correction auditive non entièrement portés par l'auditeur

Décrit une méthode pour déterminer les caractéristiques électroacoustiques globales des systèmes de correction auditive utilisés dans la réhabilitation des personnes malentendantes.

[Not translated]

General Information

Status
Published
Publication Date
15-Nov-2010
Technical Committee
Current Stage
6660 - Retro National Implementation/Publication (Adopted Project)
Start Date
15-Nov-2010
Due Date
20-Jan-2011
Completion Date
16-Nov-2010

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SIST HD 450.3 S1:2004 - IEC 60118-3:1983 je razveljavljen (ima pretisk Withdrawn)
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SLOVENSKI STANDARD
SIST HD 450.3 S1:2004
01-januar-2004
[Not translated]
Hearing aids - Part 3: Hearing aid equipment not entirely worn on the listener

Hörgeräte - Teil 3: Hörhilfen-Systeme, die nur zum Teil vom Benutzer getragen werden

Appareils de correction auditive - Partie 3: Systèmes de correction auditive non
entièrement portés par l'auditeur
Ta slovenski standard je istoveten z: HD 450.3 S1:1984
ICS:
11.180.15 3ULSRPRþNL]DJOXKHRVHEHLQ Aids for deaf and hearing
RVHEH]RNYDURVOXKD impaired people
SIST HD 450.3 S1:2004 en

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 450.3 S1:2004
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SIST HD 450.3 S1:2004
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SIST HD 450.3 S1:2004
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SIST HD 450.3 S1:2004
NORME CEI
INTERNATIONALE IEC
60118-3
INTERNATIONAL
Deuxième édition
STAN DARD
Second edition
1983-01
Appareils de correction auditive
Troisième partie:
Systèmes de correction auditive non entièrement
portés par l'auditor
Hearing aids
Part 3:
Hearing aid equipment not entirely worn
on the listener
© IEC 1983 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

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

procédé, électronique ou mécanique, y compris la photo- including photocopying and microfilm, without permission in

copie et les microfilms, sans l'accord écrit de l'éditeur. writing from the publisher.

International Electrotechnical Commission 3, rue de Varembé Geneva, Switzerland
Telefax: +41 22 919 0300 e-mail: inmail@iec.ch IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
PRICE CODE
International Electrotechnical Commission
IEC McHSAyHaponHaR 3fleNTpoTexHwiecKaR HOMNCCNfi
Pour prix, voir catalogue en vigueur
• • For price, see current catalogue
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SIST HD 450.3 S1:2004
118-3 © IEC 1983 3
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HEARING AIDS
Part 3: Hearing aid equipment not entirely worn on the listener
FOREWORD

1) The formal decisions or agreements of the IEC on technical matters, prepared by Technical Committees on which all the

National Committees having a special interest therein are represented, express, as nearly as possible, an international

consensus of opinion on the subjects dealt with.

2) They have the form of recommendations for international use and they are accepted by the National Committees in that

sense.

3) In order to promote international unification, the IEC expresses the wish that all National Committees should adopt the text

of the IEC recommendation for their national rules in so far as national conditions will permit. Any divergence between the

IEC recommendation and the corresponding national rules should, as far as possible, be clearly indicated in the latter.

PREFACE TO THE FIRST EDITION

This standard has been prepared by IEC Technical Committee No.29: Electroacoustics.

The first draft was discussed at the meeting held in Gaithersburg in 1976. As a result of this meeting, a draft, Document

29(Central Office)108, was submitted to the National Committees for approval under the Six Months' Rule in June 1977.

The following countries voted explicitly in favour of publication:
Austria Germany Spain
Sweden
Belgium Japan
Brazil Netherlands Switzerland
Czechoslovakia Norway Turkey
Denmark United Kingdom
Poland
Egypt Romania United States of America
France South Africa (Republic of)
PREFACE TO THE SECOND EDITION

This second edition comprises the first edition, issued in 1979, and editorial amendments which are due to the issuing of IEC

Publication 118-0 (1983).
Other IEC publications quoted in this standard:

Publications Nos. 65: Safety Requirements for Mains Operated Electronic and Related Apparatus for Household and

Similar General Use.
118-0: Hearing Aids, Part 0: Measurement of Electroacoustical Characteristics.
268-3: Sound System Equipment, Part 3: Sound System Amplifiers.
268-4: Sound System Equipment, Part 4: Microphones.

303: IEC Provisional Reference Coupler for the Calibration of Earphones Used in Audiometry.

318: An IEC Artificial Ear, of the Wideband Type, for the Calibration of Earphones Used in

Audiometry.

711: Occluded-ear Simulator for the Measurement of Earphones Coupled to the Ear by Ear Inserts.

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SIST HD 450.3 S1:2004
118-3 © IEC 1983 5
HEARING AIDS
Part 3: Hearing aid equipment not entirely worn on the listener
INTRODUCTION

In the rehabilitation of persons having impaired hearing, use is made of two types of electroacoustic

amplification systems:
a) Hearing aids entirely worn on the listener.

Hearing aid equipment in which the microphone or microphones are not worn on the listener.

IEC Publication 118-0: Hearing Aids, Part 0: Measurement of Electroacoustical Characteristics, gives

details of methods of measurements on hearing aids and in general covers the requirements for other hearing

aid equipment.

However, measurements on hearing aid equipment involve certain test differences which are detailed in

this standard. Reference is made wherever possible to IEC Publication 268: Sound System Equipment, for

measurements not covered in IEC Publication 118-0.
1. Scope

The purpose of this standard is to describe a method of determining the overall electroacoustic

performance of hearing aid equipment not entirely worn on the listener, used in the rehabilitation of

persons having impaired hearing.
2. Object

The methods specified in this publication give information on the measurement of those parameters

that are not fully covered in IEC Publication 118-0; i.e.:
Frequency response.
Air to air gain.
Acoustic output.
Gain and output controls.
Internal noise of the equipment.
Electrical input sensitivity and output power.

Overall effect of transmission paths in systems where the microphone(s) is (are) not connected by

wire to the earphone(s).

Measurements other than the above are specified in IEC publications, for example IEC Publication

118-0 and IEC Publication 268.
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SIST HD 450.3 S1:2004
118-3 © IEC 1983 7
3. Test equipment
3.1 General

Throughout this standard, all sound pressure levels specified are referred to 20 µPa. All voltage level

measurements are referred to 1 V. All results can be given as r.m.s. values.

Note.– With non-sinusoidal signals appreciable measuring errors can arise when using instruments which measure mean

values but are calibrated in r.m.s. terms.
3.2 Acoustic requirements for testing microphones

The microphone shall be placed in an acoustic test field in accordance with IEC Publication 268-4:

Part 4: Microphones, under the stated conditions appropriate to the microphone used and connected to

the amplifying system. Where the microphone is separate from the amplifier, only the microphone shall

be placed in the acoustic test field. Where the microphone is an integral part of a main unit, the whole

unit shall be placed in the sound field.
The method of measurement shall be described in the test report.
3.3 Acoustic couplers

IEC Publication 318: An IEC Artificial Ear, of the Wideband Type, for the Calibration of

Earphones Used in Audiometry, describes the preferred device for measuring the acoustic output of

supra-aural earphones.

IEC Publication 303: IEC Provisional Reference Coupler for the Calibration of Earphones Used in

Audiometry, describes an acoustic coupler for supra-aural earphones which may be used if a device

conforming to IEC Publication 318 is not available.

Note. – Until specifications are available for an agreed method and device for measuring the performance of ci

...

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