Home / Standards / GB/T 34828-2017 GB/T 34828-2017 Active Acoustics—Test methods for the qualification of free-field environments 声学 自由场环境评定测试方法 Standard Type GBT ICS 17.140.01 CCS A59 Status 现行 Issue Date 2017-11-01 Implementation 2018-05-01 Responsible Dept 中国科学院 Drafting Unit N/A