Engine noise is the major noise source of automobile; air power noise is one of composition parts of engine noise.

发动机噪声是汽车的主要噪声源，空气动力噪声是发动机噪声的组成部分之一。

youdao

The property of air power noise and mechanism was elaborated, some conclusions that reduce air power noise were drawn. An effective method and idea on reducing automobile engine noise was put forward.

在文中阐述了空气动力噪声的特性及产生机理，得出降低空气动力噪声的一些结论，这对于降低汽车发动机噪声提供了有效的方法与思路。

youdao

The low power, low noise, blower fan, wind knife mouth dry air temperature is used, the effective protection of material itself color and quality, the effect is better.

采用低功率、低噪音的风机，吹风口成风刀状，吹干风温为常用温，有效保护物料本身的色泽和品质，效果更佳。

youdao

This makes it easier to scale up the number of disks in the drive while keeping drive power consumption and acoustic noise at acceptable levels (and even lower than the air filled drives).

FORBES: Rare Gases and Fine Lines