Standard

NEK IEC 60118-4:1981

Jan 1981 Withdrawn

Note: This standard has a new edition: NEK IEC 60118-4:2014+A1:2017 CSV

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Language English

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Amendment 1 - Hearing aids. Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes Withdrawn NEK IEC 60118-4:1981/AMD1:1998 Amendment from Publication date: Jun 1998 Version: 1 Language: English Services: Read Online (No printing ), Printed and bound
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Amendment 2 - Recommended methods for measurements of the electro-acoustical characteristics of hearing aids Withdrawn NEK IEC 60118:1959/AMD2:1981 Amendment from Publication date: Nov 1981 Version: 1 Pages: 24 Language: English Services: Read Online (No printing ), Printed and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 NEK
Published: 1 January 1981
Withdrawn: 12 July 2007
Edition: 1.0
Version: 1
Document type: NAT
Pages
ISBN:

ICS 17.140.50
National Committee TC 29

Product Relations

Replaced by: NEK IEC 60118-4:2006
Adopted from: IEC 60068-2-75:1997 ED1

NEK IEC 60118-4:1981

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NEK IEC 60118-4:2014+A1:2017 CSV

NEK IEC 60118-4:2014

NEK IEC 60118-4:2006