IEC 60118-13:2019

IEC 60118-13 ®
Edition 5.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electroacoustics – Hearing aids –
Part 13: Requirements and methods of measurement for electromagnetic
immunity to mobile digital wireless devices

Électroacoustique – Appareils de correction auditive–
Partie 13: Exigences et méthodes de mesure de l'immunité électromagnétique
aux appareils numériques mobiles sans fil

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IEC 60118-13 ®
Edition 5.0 2019-10
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
colour
inside
Electroacoustics – Hearing aids –

Part 13: Requirements and methods of measurement for electromagnetic

immunity to mobile digital wireless devices

Électroacoustique – Appareils de correction auditive–

Partie 13: Exigences et méthodes de mesure de l'immunité électromagnétique

aux appareils numériques mobiles sans fil

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 17.140.50; 33.100.20 ISBN 978-2-8322-7330-2

– 2 – IEC 60118-13:2019 © IEC 2019
CONTENTS
FOREWORD . 3
INTRODUCTION . 5
1 Scope . 6
2 Normative references . 6
3 Terms and definitions . 6
4 Operation and function of the hearing aid . 8
5 Requirements for electromagnetic immunity. 8
5.1 General . 8
5.2 Compliance criteria . 9
6 Test procedures for immunity to radiated RF electromagnetic fields . 11
6.1 General . 11
6.2 Test setup . 11
6.3 Hearing aid test setting . 11
6.4 Determination of gain . 12
6.5 Measurement of the input related ambient noise (IRAN) . 12
6.6 Hearing aid output coupling during immunity test . 13
6.7 Position of the hearing aid during immunity test . 13
6.8 Measurement of the output related interference level (ORIL) . 14
6.9 Calculation of the input related interference level (IRIL) . 15
6.10 Report. 15
7 Measurement uncertainty for immunity to radiated RF electromagnetic fields . 16
Annex A (informative) Background for establishing test methods, performance criteria
and test levels . 17
A.1 General . 17
A.2 Radiated RF electromagnetic fields – History of the test method . 17
A.3 Performance criteria . 19
A.4 Test field strengths – Bystander compatibility . 19
A.5 Test field strengths – User compatibility . 20
Bibliography . 21

Figure 1 – Example of a test arrangement for hearing aid immunity measurements
using a GTEM cell . 11
Figure 2 – Examples of input-output response curves at 1 kHz and the determination
of gain at an input SPL of 55 dB . 12
Figure 3 – Hearing aid test positions for BTE (upper) and ITE (lower) . 14
Figure A.1 – Ratio of 1:2 between field strength and interference level in dB . 18
Figure A.2 – Example of test arrangement for hearing aid immunity measurements
using dipole antenna . 20

Table 1 – Field strengths of RF test signals to be used to establish immunity for
bystander compatible and user compatible hearing aids . 10

INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ELECTROACOUSTICS –
HEARING AIDS –
Part 13: Requirements and methods of measurement
for electromagnetic immunity to mobile digital wireless devices

FOREWORD
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International Standard IEC 60118-13 has been prepared by IEC technical committee 29:
Electroacoustics.
This fifth edition cancels and replaces the fourth edition published in 2016 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
a) it introduces a new measurement method and set of EMC requirements for hearing aids
immunity to mobile digital
...