China 'GB/T 20441.5-2017
' standard english version:
NATIONAL STANDARD OF THE PEOPLE'S REPUBLIC OF CHINA
GB/T 20441.5-2017
Electroacoustics—Measurement microphones—Part 5: Methods for pressure calibration of working standard microphones by comparison 电声学 测量传声器 第5部分:工作标准传声器声压校准的比较法
Issued Date:2017-09-07
Implemented Date:2018-04-01
Issued by:
The Standardization Administration of the People's Republic of China