
Hearing Aids - Iec Reference Coupler For The Measurement Of Hearing Aids Using Earphones Coupled To The Ear By Means Of Ear Inserts
出版:Nederlands Normalisatie Instituut

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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 5000 Hz, of air-conduction hearing aids using earphones coupled to the ear by means of ear inserts, e.g. ear moulds or similar devices.
IEC 60126 Ed. 2.0 - Identical