对气动凿岩机钎杆产生的噪声特性进行了分析研究，介绍了钎杆噪声的治理方法。
This paper analysed the noise characteristic of pneumatic rock drill stell. Introducing the harness method of pneumatic rock drill stell noise.
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。
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.
对气动凿岩机产生的噪声声源进行了全面的分析研究，介绍了各声源的特性及测试方法。
This paper is based the full analyse and research of noise source of pneumatic drill.
研究剪刀式尾桨气动噪声的混沌特性，并应用混沌理论进行了直升机尾桨气动噪声信号分析。
Chaos characteristics of the aerodynamic noise are discussed and the aeroacoustic noise signals on helicopter scissors tail rotor is analyzed by the chaos theory.
并知空压机的空气动力性噪声呈低频特性，这为噪声及振动控制提供了可靠的依据。
The knowing noise of the air compressor "s air dynamic is of low frequencies. The reliable data is provided for the noise and vibration control."
并知空压机的空气动力性噪声呈低频特性，这为噪声及振动控制提供了可靠的依据。
The knowing noise of the air compressor "s air dynamic is of low frequencies. The reliable data is provided for the noise and vibration control."
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