HD 450.9 S1:1987

Hearing aids - Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output

Defines a method of expressing the input/output ratio as an acousto-mechanical sensitivity level measured on a mechanical coupler according to the second edition of HD 590. Provides a suitable basis for the exchange of information or for direct comparison of the electroacoustic characteristics of hearing aids using bone vibrator outputs. The methods chosen are practical and reproducible and are based on selected fixed parameters.

Hörgeräte - Teil 9: Verfahren zur Messung der Übertragungseigenschaften von Knochenleitungshörgeräten

Appareils de correction auditive - Partie 9: Méthodes de mesure des caractéristiques des appareils de correction auditive à sortie par ossivibrateur

Définit une méthode pour exprimer le rapport entrée/sortie par un niveau de sensibilité acousto-mécanique mesuré sur un coupleur mécanique conforme à la deuxième édition de la HD 590. Donne une base convenable pour l'échange d'information ou pour la comparaison directe des caractéristiques électro-acoustiques des appareils de correction auditive utilisant des sorties par ossivibrateur. On a adopté des méthodes pratiques et reproductibles, basées sur le choix de paramètres fixes.

[Not translated]

General Information

• Status: Withdrawn
• Publication Date: 15-Oct-1987
• Withdrawal Date: 29-Jun-1988
• Technical Committee: CLC/SR 29 - Electroacoustics
• Drafting Committee: IEC/TC 29 - IEC_TC_29
• Parallel Committee: IEC/TC 29 - IEC_TC_29
• Ref Project: SIST HD 450.9 S1:2004 - Hearing aids - Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output

Standards Content (Sample)

SLOVENSKI STANDARD
SIST HD 450.9 S1:2004
01-januar-2004
[Not translated]
Hearing aids - Part 9: Methods of measurement of characteristics of hearing aids with
bone vibrator output
Hörgeräte - Teil 9: Verfahren zur Messung der Übertragungseigenschaften von
Knochenleitungshörgeräten
Appareils de correction auditive - Partie 9: Méthodes de mesure des caractéristiques des
appareils de correction auditive à sortie par ossivibrateur
Ta slovenski standard je istoveten z: HD 450.9 S1:1987
ICS:
11.180.15 3ULSRPRþNL]DJOXKHRVHEHLQ Aids for deaf and hearing
RVHEH]RNYDURVOXKD impaired people
17.140.50 Elektroakustika Electroacoustics
SIST HD 450.9 S1:2004 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

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SIST HD 450.9 S1:2004

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SIST HD 450.9 S1:2004

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SIST HD 450.9 S1:2004

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SIST HD 450.9 S1:2004
NORME CEI
INTERNATIONALE IEC
60118-9
INTERNATIONAL
Première
édition
STANDARD
First edition
1985-01
Appareils
de correction auditive
Neuvième partie:
Méthodes de mesure des caractéristiques
des appareils de correction auditive à sortie
par ossivibrateur
Hearing aids
Part 9:
Methods of measurement of characteristics
of hearing aids with bone vibrator output
© IEC 1985
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 quelque forme
sous 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: [phone] e-mail: [e-mail] IEC web site http: //www.iec.ch
CODE PRIX
Commission Electrotechnique Internationale
L
PRICE CODE
International Electrotechnical Commission
IEC
MemayHapogwaa 3neKrporexHH4ecnaa HoMHCCHc
Pour prix, voir catalogue en vigueur
• • For price, see current catalogue

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SIST HD 450.9 S1:2004
118-9 © I E C 1985 — 3 —
CONTENTS
Pages
5
FOREWORD
PREFACE 5
INTRODUCTION 7
Clause
7
1. Scope
7 2. Object
9
3. General
9
4. Explanation of terms
13
Test equipment 5.
13
6. Test conditions
17
7. Measurements
21
8. Frequency response recording chart
APPENDIX A – Examples of test assemblies 22

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SIST HD 450.9 S1:2004
118-9 © I E C 1985 — 5 —
INTERNATIONAL ELECTROTECHNICAL COMMISSION
HEARING AIDS
Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output
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
This standard has been prepared by IEC Technical Committee No.29: Electroacoustics.
The text of this standard is based on the following documents:
Six Months' Rule Report on Voting
29(CO)133 29(CO)137
Further information can be found in the Report on Voting, indicated in the table above.

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SIST HD 450.9 S1:2004
118-9 © IEC 1985 — 7 —
HEARING AIDS
Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output
INTRODUCTION
IEC Publication 118-0: Hearing Aids, Part 0: Measurement of Electroacoustical Characteristics, gives
information on methods of test for air conduction hearing aids. The majority of hearing aids in use are of this
type but a small percentage use a bone vibrator instead of an earphone. The use of a bone vibrator requires a
different method of measuring the output from the hearing aid and also makes it impractical to measure
amplification directly in terms of acoustic gain.
Amplification in the case of an air conduction hearing aid is expressed as the difference between the output
sound pressure level in an acoustic coupler or ear simulator and the input so
...