GB/T 4854.7-2008 Standard PDF file download ; GB/T 4854.7-2008 Standard english preview version download

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	$15 USD per 50 pages
English Translation Price	About $15 per 1 page; Inquire us for detail price

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