Home / Standards / GB/T 17561-1998 GB/T 17561-1998 Active Instruments for the measurement of sound intensity--Measurement with pairs of pressure sensing microphones 声强测量仪 用声压传声器对测量 Standard Type GBT ICS 33.160.60 CCS M72 Status 现行 Issue Date 1998-11-10 Implementation 1999-07-01 Responsible Dept 工业和信息化部(电子) Drafting Unit N/A