The document describes an acoustic coupler for loading supra-aural audiometric earphones as specified in ISO 389-1 with a specified acoustic impedance, when calibrating audiometers, in the frequency range of 125 Hz to 8.000 Hz. The sound pressure developed by an earphone is not, in general, the same in the coupler as in person's ear. However, the IEC recommends its use as a simple and ready means for the exchange of specifications on audiometers and for the calibration of specified earphones used in audiometry.#,,#
DIN EN 60318-3-1999由德国标准化学会 DE-DIN 发布于 1999-09,并于 1999-09-01 实施。
DIN EN 60318-3-1999 在中国标准分类中归属于: L31 电声器件,在国际标准分类中归属于: 13.140 噪声(与人有关的)。
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