x
uploads/surface noise.jpg

surface noise (唱片上的)雜音。

surface printing

Abstract : in the paper , based on the problem that strong reactive background noise can bring about a big measurement error when sound power is measured in a narrow room , such as power room in a diesel locomotive , it is analyzed theoretically that sound power is measured and carried out by using sound intensity probe hood , and sound power of diesel engine surface noise is measured in a power room 文摘:在狹小空間如內燃機車動力室的條件下,測量柴油機表面噪聲聲功率時,動力室內抗性背景聲很強引起較大的測量誤差,從理論上分析了采用聲強探頭罩進行聲功率測量的可行性,并進行了內燃機車柴油機表面噪聲的聲功率測量。

A study on the surface noise source identification of a diesel engine 柴油機表面噪聲源識別技術研究