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 China 'GB/T 4854.9-2016 ' standard english version:

　

NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

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
Issued Date:2016-02-24 　 Implemented Date:2016-09-01
Issued by: 　 The Standardization Administration of the People's Republic of China
　

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GB Standard Code GB/T 4854.9-2016
Standard Category China National Standards
GB Standard English Title Acoustics—Reference zero for the calibration of audiometric equipment—Part 9: Preferred test conditions for the determination of reference hearing threshold levels
GB Standard Chinese Title 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
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