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HD 450.4 S1:1984

Hearing aids - Part 4: Magnetic field strength in audio-frequency induction loops for hearing aid purposes HD 450.4 S1:1984

General information

99.60 Withdrawal effective   Aug 1, 1998

CENELEC

CLC/SR 29 Electroacoustics

Harmonization Document

Scope

This standard 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

Life cycle

NOW

WITHDRAWN
HD 450.4 S1:1984
99.60 Withdrawal effective
Aug 1, 1998

REVISED BY

WITHDRAWN
EN 60118-4:1998

Relations

Adopted from IEC 60118-4:1981 IDENTICAL