Noise is measured in an anechoic room. 噪音值是在无音室中的测量值。
A NSA model of impact anechoic chamber ispresented herein theoretically. 文章首先经过推导和计算,得出了一套计算紧缩型暗室的归一化场地衰减(NSA)理论值模型。
The shape of cavity should be optimized in the design of anechoic coating. 在覆盖层设计中，空腔的形状应有一个优化的过程。
The internal structure appeared to be cystoid and anechoic in 15 cases. 15例囊肿内为无回声区,囊壁均匀、光滑,后方回声增强,5例内部为弱回声,囊壁均匀光滑。
A high density MDF cabinet with walls of varying thickness is heavily damped with bitumen and lined with anechoic grade foam. 高密度的MDF箱体四周配以不同厚度的高阻尼沥青和内衬消声泡沫。
Model Helicopter Rotor Aerodynamics and Acoustics As Measured in Tow Anechoic Wind Tunnels. 在两个无回声风洞中测量时模型直升机旋翼空气动力学与声学。
