IEC 60118-8 Ed. 2.0 b:2005

Current Revision
Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated [in situ] working conditions

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Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated [in situ] working conditions

PUBLISH DATE 2005
PAGES 72

Electroacoustics - Hearing aids - Part 8: Methods of measurement of performance characteristics of hearing aids under simulated in situ working conditions.

Describes methods for a test which simulates the acoustical effects of a median adult wearer on the performance of a hearing aid.

Establishes certain guidelines for simulated *in situ* measurements of hearing aids; it describes a simplified method for simulated *in situ* measurements of hearing aids and a description for determination of the directivity index (DI) of directional microphones in hearing aids in the horizontal plane.

In addition, this second edition now specifies tolerances.

Conformance to the specifications in this International Standard is demonstrated only when the result of a measurement, extended by the actual expanded uncertainty of measurement of the testing laboratory, lies fully within the tolerances specified in this International Standard extended by the values for Umax.

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