1) noise level
噪声级
1.
Rigid clamping of the silencer also reduced the noise level.
约束阻尼层处理和冷却风扇盖硬化处理 ,可有效减小噪声级达 3dB。
2.
Introduced the noise classification and the mechanism of centrifugal fan in the rubber industry, and analyzed the conversion of centrifugal fan noise level.
介绍了橡胶工业用离心风机的噪声分类及噪声机理,分析了离心风机噪声级的换算。
3.
In view of the situation that the rise of noise level in the area protected by noise-barriers on many highways and urban roads in China, the authors think that the increasement of traffic, ratio acceleration of heavy trunks and over-loading vehicles, different kinds of apertures of noise-barriers are the main causes.
针对国内不少公路及城市道路声屏障保护区噪声级明显上升的状况 ,提出了交通量增加、重型车和超载车比例增大 ,以及各种声屏障的缝隙是影响降噪效果的主要原因 ,并对此进行了理论分析和探
2) noise grade A
噪声A声级
3) noise level L_(WECPN)
噪声级LWECPN
4) noise grade,noise level
噪声等级
5) noise rating
噪声分级
6) white-noise level
白噪声级
补充资料：感觉噪声级
见噪声的主观评价。
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条