GB/T 25498.5-2017
ActiveElectroacoustics—Simulators of human head and ear—Part 5:2 cm3 coupler for the measurement of hearing aids and earphones coupled to the ear by means of ear inserts
电声学 人头模拟器和耳模拟器 第5部分:测量助听器和以插入方式与人耳耦合的耳机用2cm3声耦合器
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