maximum allowable noise level

measured noise level [MNL]

量度所得的噪音声级

Leq (15 min/30 min)

等效连续噪音声级（15分钟／30分钟的量度）

silencer(sound deadener)

噪音消声器（隔音材料）

a noise resembling the bark of a dog.

象狗咆哮的声音的噪声。

not be woken up by(eg a noise or an alarm clock)

声音（如噪声、闹钟）吵不醒

noise-killing battery

消杂音电池，消噪声电池

Acoustics Design and Noise Control ?

音质设计与噪声控制

"Noise" cannot be measured in the same way because it refers to the psychological effect of sound and its level of "intensity" depends on the situation.

这是因为噪音所指的是声音的心理效果，其强度级别依照具体情况而定。

A confused or harsh sound or mingling of sounds.

噪音混杂、刺耳的声音,或多种声音的混合

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

loud confused noise from many sources.

各种声音混在一起产生的噪音。

deaden (a sound or noise), esp. by wrapping.

尤指用包装使声音或噪音消失。

To cause to make a harsh, discordant sound.

引发噪音引发出刺耳的、不和谐的声音

His waice is barely audible above the noise of the machinery

机器的噪声很响,他的声音几乎听不见

His voice was barely audible above the noise of the machinery.

机器的噪声很响,他的声音几乎听不见。

The most direct method of noise control is the reduction of the noise at its source.

控制噪音最直接的方法就是在噪音源处降低噪声。

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