Home / Standards / GB/T 3449-2011 GB/T 3449-2011 Active Acoustics - Measurement of noise inside railbound vehicles 声学 轨道车辆内部噪声测量 Standard Type GBT ICS 17.140 CCS A59 Status 现行 Issue Date 2011-12-30 Implementation 2012-05-01 Responsible Dept 中国科学院 Drafting Unit 中国科学院