Home / Standards / GB/T 7584.3-2011 GB/T 7584.3-2011 Active Acoustics - Hearing protectors - Part 3: Measurement of insertion loss of ear-muff type protectors using an acoustic test fixture 声学 护听器 第3部分：使用专用声学测试装置 测量耳罩式护听器的插入损失 Standard Type GBT ICS 13.340.20 CCS C73 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 中国科学院 Drafting Unit N/A