IEC 60118-0:2015

Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids

IEC 60118-0:2015 gives recommendations for the measurement of the performance characteristics of air conduction hearing aids based on a free field technique and measured with an acoustic coupler. This third edition cancels and replaces the second edition published in 1983 and its Amendment 1:1994 as well as IEC 60118-1:1995, Amendment 1:1998, IEC 60118-2:1983, Amendment 1:1993, Amendment 2:1997 and IEC 60118-6:1999. This edition constitutes a technical revision.

Electroacoustique - Appareils de correction auditive - Partie 0: Mesure des caractéristiques fonctionnelles des appareils de correction auditive

L'IEC 60118-0:2015 donne des recommandations pour la mesure des caractéristiques fonctionnelles des appareils de correction auditive à conduction aérienne, fondée sur une technique en champ acoustique libre utilisant un coupleur acoustique. Cette troisième édition annule et remplace la deuxième édition parue en 1983 et son Amendement 1:1994, l'IEC 60118-1:1995, l'Amendement 1:1998, l'IEC 60118-2:1983, l'Amendement 1:1993, l'Amendement 2:1997 et l'IEC 60118-6:1999. Cette édition constitue une révision technique.

General Information

• Status: Published
• Publication Date: 08-Jun-2015
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 17.140.50 - Electroacoustics
• Technical Committee: TC 29 - Electroacoustics
• Drafting Committee: WG 13 - TC 29/WG 13
• Current Stage: DELPUB - Deleted Publication
• Start Date: 18-May-2018
• Completion Date: 30-Aug-2022

Relations

• Replaces: IEC 60118-2:1983/AMD2:1997 - Amendment 2 - Hearing aids. Part 2: Hearing aids with automatic gain control circuits
• Effective Date: 05-Sep-2023
• Replaces: IEC 60118-1:1995/AMD1:1998 - Amendment 1 - Hearing aids - Part 1: Hearing aids with induction pick-up coil input
• Effective Date: 05-Sep-2023
• Replaces: IEC 60118-6:1999 - Hearing aids - Part 6: Characteristics of electrical input circuits for hearing aids
• Effective Date: 05-Sep-2023
• Replaces: IEC 60118-1:1995 - Hearing aids - Part 1: Hearing aids with induction pick-up coil input
• Effective Date: 05-Sep-2023
• Revised: IEC 60118-0:2022 - Electroacoustics - Hearing aids - Part 0: Measurement of the performance characteristics of hearing aids
• Effective Date: 05-Sep-2023

Standards Content (Sample)

IEC 60118-0 ®
Edition 3.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Hearing aids –
Part 0: Measurement of the performance characteristics of hearing aids

Électroacoustique – Appareils de correction auditive –
Partie 0: Mesure des caractéristiques fonctionnelles des appareils de correction
auditive
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IEC 60118-0 ®
Edition 3.0 2015-06
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Electroacoustics – Hearing aids –

Part 0: Measurement of the performance characteristics of hearing aids

Électroacoustique – Appareils de correction auditive –

Partie 0: Mesure des caractéristiques fonctionnelles des appareils de correction

auditive
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50 ISBN 978-2-8322-2692-6

– 2 – IEC 60118-0:2015 © IEC 2015
CONTENTS
FOREWORD . 5
1 Scope . 7
2 Normative references. 7
3 Terms and definitions . 8
4 General conditions . 12
4.1 Acoustic test method . 12
4.2 Acoustic coupler . 13
4.3 Measurement frequency range . 13
4.4 Reporting of data . 13
5 Test enclosure and test equipment . 13
5.1 General . 13
5.2 Unwanted stimuli in the test enclosure . 13
5.3 Sound source . 13
5.4 Measurement system for the measurement of the sound pressure level and
harmonic distortion produced by a hearing aid . 14
5.5 Direct-current measuring system . 14
5.6 Magnetic field source for ETLS and MASL measurements . 15
6 Test conditions . 15
6.1 General . 15
6.2 Control of the sound field . 16
6.3 Measurement configuration for directional hearing aids . 17
6.4 Normal operating conditions for a hearing aid . 18
6.4.1 General . 18
6.4.2 Battery or supply voltage . 18
6.4.3 Settings of controls . 19
6.4.4 Ambient conditions . 19
6.4.5 Sound outlet system . 19
6.4.6 Accessories . 20
7 Test procedures . 20
7.1 Frequency response curves . 20
7.2 OSPL90 frequency response curve . 20
7.3 Full-on gain response curve . 21
7.4 Basic frequency response curve . 21
7.4.1 Test procedure . 21
7.4.2 Frequency range . 22
7.4.3 Reference test gain (RTG) . 23
7.5 Total harmonic distortion . 23
7.6 Equivalent input noise . 23
7.7 Battery current . 23
7.8 Measurements for hearing aids having induction pick-up coil . 24
7.8.1 General . 24
7.8.2 Equivalent test loop sensitivity (ETLS) . 24
7.8.3 Maximum HFA magneto-acoustical sensitivity level (HFA MASL) of
induction pick-up coil . 24
8 Characteristics of electrical input circuits for hearing aids . 24
8.1 Electrical characteristics . 24
8.1.1 General . 24

8.1.2 Input impedance . 25
8.1.3 Input sensitivity . 25
8.2 Mechanical characteristics and electrical function of connector system for
electrical input. 25
9 Additional optional test procedures . 25
9.1 General . 25
9.2 Effects of tone control and gain control . 25
9.2.1 Basic frequency response: effect of tone control . 25
9.2.2 Frequency response: effect of gain control position . 25
9.2.3 Characteristics of the gain control . 26
9.3 Intermodulation distortion . 26
9.4 Effects of variation of battery or supply voltage and internal resistance . 26
9.4.1 Full-on gain . 26
9.4.2 OSPL90 . 27
9.4.3 Total harmonic distortion . 27
9.4.4 Total intermodulation distortion . 27
9.5 Equivalent input noise in one-third-octave bands . 27
9.6 Additional measurements for hearing aids having induction pick-up coil . 30
9.6.1 General . 30
9.6.2 Basic frequency response . 30
9.6.3 Frequency response with full-on gain control setting . 30
9.6.4 Effect of gain control position on frequency response . 30
9.6.5 Harmonic distortion .
...