HD 450.9 S1:1987

Hearing aids - Part 9: Methods of measurement of characteristics of hearing aids with bone vibrator output HD 450.9 S1:1987

Publication date:   Jan 30, 2004

General information

99.60 Withdrawal effective   Aug 2, 2023

CENELEC

CLC/SR 29 Electroacoustics

Harmonization Document

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Scope

Defines a method of expressing the input/output ratio as an acousto-mechanical sensitivity level measured on a mechanical coupler according to the second edition of HD 590. Provides a suitable basis for the exchange of information or for direct comparison of the electroacoustic characteristics of hearing aids using bone vibrator outputs. The methods chosen are practical and reproducible and are based on selected fixed parameters.

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HD 450.9 S1:1987
99.60 Withdrawal effective
Aug 2, 2023

Relations

Adopted from IEC 60118-9:1985 IDENTICAL