The test data indicates that the silencing cover which is set on the rail has gotten good silencing effect 測試數據說明在道軌上加設消聲套后取得了良好的消聲效果。
This method is effictive to control muffler attenuation of the muffler structure which is axis symmetry 這一方法對控制以軸向尺寸為主的消聲結構的消聲低谷非常有效。
Acoustics - determination of sound power levels of noise sources - precision methods for anechoic and semi - anechoic rooms 聲學噪聲源聲功率級的測定消聲室和半消聲室精密法
Anechoic chambers - part 2 : alternative test site suitability with respect to site attenuation ; german version en 50147 - 2 : 1996 消聲室.第2部分:備選消聲測試場的適用性要求
