标准摘要
[中文适用范围]： IEC 60318 的这一部分规定了用于测量 125 Hz 至 8 000 Hz 频率范围内的贴耳式测听耳机的声耦合器。一般来说，耳机在耦合器中产生的声压与在人耳中产生的声压不同。然而，声耦合器可以用作测量贴耳式耳机输出的客观且可重复的方法。它可用于指定听力计校准的参考等效阈值声压级 (RETSPL)。 [外文原描述]： IEC 60318-3:2014 specifies an acoustic coupler for the measurement of supra-aural audiometric earphones in the frequency range from 125 Hz to 8 000 Hz. The sound pressure developed by an earphone is not, in general, the same in the coupler as in a person's ear. However, the acoustic coupler can be used as an objective and reproducible means of measuring the output of supra-aural earphones. It can be used for specifying reference equivalent threshold sound pressure levels for the calibration of audiometers. This second edition cancels and replaces the first edition published in 1998 and constitutes a technical revision which includes the following significant technical changes with respect to the previous edition: - adjustment of terms and wording to the other parts of IEC 60318; - introduction of maximum permitted uncertainties; - and revised requirements for static pressure equalization. Keywords: electroacoustics, deafness, hearing aids
英文名称Electroacoustics - Simulators of human head and ear - Part 3: Acoustic coupler for the calibration of supra-aural earphones used in audiometry