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China Acoustics—Reference GB Standards Search Result

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GB/T 4854.3-2022
Acoustics—Reference zero for the calibration of audiometric equipment—Part 3:Reference equivalent threshold vibratory force levels for pure tones and bone vibrators
声学 校准测听设备的基准零级 第3部分: 骨振器纯音基准等效阈振动力级 - 英文版
GB/T 4854.9-2016
Acoustics—Reference zero for the calibration of audiometric equipment—Part 9: Preferred test conditions for the determination of reference hearing threshold levels
声学 校准测听设备的基准零级 第9部分:确定基准听阈级的优选测试条件 - 英文版

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