$10
Electroacoustics—Simulators of human head and ear—Part 3:Acoustic coupler for the calibration of supra-aural earphones used in audiometry
IDT IEC 60318-3:1998
全国电声学标准化技术委员会(SAC/TC 23)
GB/T 25498的本部分规定了听力计校准中,以压耳式测听耳机为负载的具有一定声阻抗的声耦合器结构和特性,频率范围为125 Hz~8 000 Hz,该测听耳机在GB/T 4854.1中规定。
耳机在耦合器中产生的声压级一般不等于在人耳内产生的声压级。然而,为了听力计指标具有互换性以及测听耳机的校准,本部分规定的装置适用于简单快速方法。
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