Home / Standards / GB/T 7583-1987 GB/T 7583-1987 Active Acoustics--Pure tone air conductionthreshold audio-metry--For hearing conservation purposes 声学 纯音气导听阈测定 听力保护用 Standard Type GBT ICS N/A CCS A42 Status Active Issue Date 1987-03-27 Implementation 1987-11-01 Centralized Committee 中国科学院 Issuing Authority 国家标准局