Home / Standards / GB/T 3240-1982 GB/T 3240-1982 Active Preferred frequencies for the acoustical measurement 声学测量中的常用频率 Standard Type GBT ICS N/A CCS A41 Status Active Issue Date 1982-06-08 Implementation 1983-07-01 Centralized Committee 中国科学院 Issuing Authority 国家标准局