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HD 305 S1:1977

IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts HD 305 S1:1977

Publication date:   Dec 22, 2003

General information

99.60   Withdrawal effective   May 13, 2006

CENELEC

CLC/SR 29 Electroacoustics

Harmonization Document

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Scope

Describes a coupler for loading the earphone with a specified acoustic impedance when determining the physical performance characteristics, in the frequency range 200 Hz to 5 000 Hz, of air-conduction hearing aids using earphones coupled to the ear by means of ear inserts, e.g. ear moulds or similar devices. The use of this coupler does not allow the actual performance of a hearing aid on a person to be obtained. Its use is recommended as a simple and ready means for the exchange of specifications and of physical data on hearing aids.

Life cycle

NOW

WITHDRAWN
HD 305 S1:1977
99.60 Withdrawal effective
May 13, 2006

Relations

Adopted from IEC 60126:1973 IDENTICAL




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