IS 10781-1984

标准号：IS 10781-1984
发布日期：1985/3/1 12:00:00
实施日期：1999/12/31 12:00:00
适用范围：The object of this recommendation is to describe 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. The coupler described is a develop-ment of an earlier 2 cm3 coupler.The use of this coupler does not allow the actual performance of a hearing aid on a person to be obtained; however, the 1 EC recommends its use as a simple and ready means for the exchange of specifications and of physical data on hearing aids.