noise level是什么意思

网络释义

用法例句

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。

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。

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

Regulation on noise levels on board sea-going ships

GB5979-1986海洋船舶噪声级规定

measured noise level [MNL]

量度所得的噪音声级

Two-stage impulse noise filtering algorithm based on PCNN noise detection

基于PCNN噪声检测的两级脉冲噪声滤波算法

Determination of sound power level for noise emitted by woodworking machinery

GB/T3770-1983木工机床噪声声功率级的测定

Determination of sound power levels of noise emitted by household electrical appliances

GB/T4214-1984家用电器噪声声功率级的测定

Conclusion The workplace can be classified by equivalent consecutive sound level A.

结论噪声作业可以用等效连续A声级来进行分级。

Research on Multi-channel Adaptive Active Noise Control Systems for Reducing Vehicle Interior Low Frequency Noise;

车内低频噪声多次级声源有源消声系统研究

Noise Pollution Levels of Urban Road Traffic in 2001

2001年度城市道路交通噪声污染分级

Noise Pollution Levels of Urban Regional Noise Pollution

2001年度城市区域噪声污染分级

Noise figures of cascaded two-port networks with unequal bandwidth

不等带宽两端口网络级联的噪声系数

Acoustics--Determination of sound power levels of noise sources using sound pressure--Survey method using a reference sound source

GB/T16538-1996声学声压法测定噪声源声功率级使用标准声源简易法

Acoustics--Determination of sound power levels of noise sources--Precision methods for anechoic and semi-anechoic rooms

GB/T6882-1986声学噪声源声功率级的测定消声室和半消声室精密法

Metal-cutting machine tools--Measurement method of sound pressure level

GB/T16769-1997金属切削机床噪声声压级测量方法

Determination of sound power levels of noise emitted by metal cutting machine tools

GB/T4215-1984金属切削机床噪声声功率级的测定

Determination of sound power level for noise emitted by reciprocating pump--Engineering method

GB/T9069-1988往复泵噪声声功率级的测定工程法

Determination of sound power levels of internal combustion engines noise-Quasi-engineering method

GB/T1859-1989内燃机噪声声功率级的测定准工程法

Determination of sound power level for noise emitted by centrifuger separator and filter - Engineering method

GB/T10894-1989分离机械噪声声功率级的测定工程法

Comparison of Equivalent Regional Environmental Noise Level in State-Controlled Cities in 2001

2001年度国控城市区域环境噪声等效声级比较