surface noise meaning in Chinese

(唱片上的)杂音。

A study on the surface noise source identification of a diesel engine
柴油机表面噪声源识别技术研究
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:在狭小空间如内燃机车动力室的条件下，测量柴油机表面噪声声功率时，动力室内抗性背景声很强引起较大的测量误差，从理论上分析了采用声强探头罩进行声功率测量的可行性，并进行了内燃机车柴油机表面噪声的声功率测量。