声学 噪声源声功率级的测定 消声室和半消声室精密法
Acoustics--Determination of sound power levels of noise sources--Precision methods for anechoic andsemi-anechoic rooms
标准状态
发布于:1986-09-13
实施于:1987-07-01
已废止
Acoustics--Determination of sound power levels of noise sources--Precision methods for anechoic andsemi-anechoic rooms