Home / Standards / GB/T 16405-2025 GB/T 16405-2025 Active Acoustics—Measurement of insertion loss of ducted silencers without flow—Laboratory survey method 声学 管道消声器无气流下插入损失测量 实验室简易法 Standard Type GBT ICS 17.140 CCS A59 Status 现行 Issue Date 2025-05-30 Implementation 2025-12-01 Responsible Dept 中国科学院 Drafting Unit N/A