China 'GB/T 4854.1-2004
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 4854.1-2004
Acoustics--Reference zero for the calibration of audiometric equipment--Part1:Reference equivalent threshold sound pressure levels for pure tones and supra-aural earphones 声学 校准测听设备的基准零级 第1部分:压耳式耳机纯音基准等效阈声压级
Issued Date:2004-05-13
Implemented Date:2004-12-01
Issued by:
The Standardization Administration of the People's Republic of China
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