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EVS-HD 305 S1:2003

IEC reference coupler for the measurement of hearing aids using earphones coupled to the ear by means of ear inserts

General information
Withdrawn from 06.11.2009
Base Documents
IEC 60126:1973; HD 305 S1:1977
Directives or regulations
None

Standard history

Status
Date
Type
Name
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.
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