减低汽车行驶中的空气阻力、抑制其行驶时的气动噪声具有十分重要的意义。
It is very important to reduce the aerodynamic drag and noise for traveling vehicles.
传统的噪声控制主要是从减低人耳听力损伤方面考虑来进行噪声控制的——降低噪声声级。
Traditional noise control mainly focus on reducing the damage to human ear by decrease noise.
分析了斜轴式柱塞泵产生噪声的原因，并提出了减低噪声的方法。
The paper analyzes the reasons why there are noises with Angle plunger pump and puts forward noise reduction measures.
在密闭型耳罩中，利用有源降噪技术可以较好地衰减低频噪声以使整个可听声频率范围内获得良好的衰减特性。
L. f. noise can be better attenuated so as to obtain good attenuation characteristics over the entire audible frequency range by using active noise reduction technique in the closed-air type earmuff.
在密闭型耳罩中，利用有源降噪技术可以较好地衰减低频噪声以使整个可听声频率范围内获得良好的衰减特性。
L. f. noise can be better attenuated so as to obtain good attenuation characteristics over the entire audible frequency range by using active noise reduction technique in the closed-air type earmuff.
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