Standard

IEC 60118-4:1981 ED1

Jan 1981 Revised

Note: This standard has a new edition: IEC 60118-4:2014+AMD1:2017 CSV

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Amendment 1 - Hearing aids. Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes Revised IEC 60118-4:1981/AMD1:1998 ED1 Amendment from Publication date: Jun 1998 Version: 1 Pages: 3 Language: English/French Services: Read Online (No printing ), Printed and bound

Abstract

Applies to audio-frequency induction loop systems producing an alternating magnetic field and intended to provide an input signal for hearing aids operating with an induction pick-up coil. Specifies a standard value of magnetic field strength in audio-frequency induction loops for hearing aid purposes, such as will give an adequate signal-to-noise ratio without overloading the hearing aid.

Document information

Standard from IEC
Published: 1 January 1981
Withdrawn: 27 October 2006
Edition: 1
Version: 1
Document type: IS
Pages
ISBN: 2831807026

ICS 17.140.50
ISO TC TC 29

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Revised by: IEC 60118-4:2006 ED2

IEC 60118-4:1981 ED1

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IEC 60118-4:2014+AMD1:2017 CSV

IEC 60118-4:2014 ED3

IEC 60118-4:2006 ED2