IEC 60118-4:1981/AMD1:1998

IEC 60118-4:1981/AMD1:1998

June 1998
International standard Cancelled

Amendment 1 - Hearing aids. Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes

Main informations

Collections

International IEC standards

Publication date

June 1998

Number of pages

3 p.

Reference

IEC 60118-4:1981/AMD1:1998

Print number

1
Standard replaced by (1)
IEC 60118-4:2006
October 2006
International standard Cancelled
Electroacoustics - Hearing aids - Part 4: Induction loop systems for hearing aid purposes - Magnetic field strength

Applies to audio-frequency induction loop systems producing an alternating magnetic field at audio frequencies and intended to provide an input signal for hearing aids operating with an induction pick-up coil. The standard specifies requirements for the field strength in audio-frequency induction loops for hearing aid purposes, which will give adequate signal-to-noise ratio without overloading the hearing aid. The standard also specifies the minimum frequency response requirements for acceptable intelligibility. Methods for measuring the magnetic field strength are specified, and information is given on appropriate measuring equipment (see Annex B), information that should be provided to the operator and users of the system (see Annex C), and other important considerations.

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