China 'GB/T 20441.3-2010
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 20441.3-2010
Electroacoustics - Measurement microphone - Part 3: Primary method for free-field calibration of laboratory standard microphones by the reciprocity technique 电声学 测量传声器 第3部分：采用互易技术对实验室标准传声器的自由场校准的原级方法
Issued Date:2010-12-01
Implemented Date:2011-05-01
Issued by:
The Standardization Administration of the People's Republic of China
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