China Electroacoustics—Sim GB Standards Search Result

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	GB/T 25498.5-2017 Electroacoustics—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 - 中英文版

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