Home / Standards / GB/T 4854.3-1998 GB/T 4854.3-1998 Abolished Acoustics--Reference zero for the calibration of audiometric equipment--Part 3:Reference equivalent threshold force levels for pure tones and bone vibrators 声学 校准测听设备的基准零级 第3部分:骨振器纯音基准等效阈力级 Standard Type GBT ICS 17.140 CCS A59 Status 废止 Issue Date 1998-03-18 Implementation 1998-10-01 Responsible Dept 中国科学院 Drafting Unit 中国科学院