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 China 'GB/T 4854.7-2008 ' standard english version:

　

NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA

GB/T 4854.7-2008

Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
声学 校准测听设备的基准零级 第7部分: 自由场与扩散场测听的基准听阈
Issued Date:2008-07-02 　 Implemented Date:2009-02-01
Issued by: 　 The Standardization Administration of the People's Republic of China
　

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GB Standard Code GB/T 4854.7-2008
Standard Category China National Standards
GB Standard English Title Acoustics - Reference zero for the calibration of audiometric equipment - Part 7: Reference threshold of hearing under free-field and diffuse-field listening conditions
GB Standard Chinese Title 声学 校准测听设备的基准零级 第7部分: 自由场与扩散场测听的基准听阈
Chinese Version Price $5.00  per  page
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