振动能量常以两种方式向外传播而产生噪声,一部分由振动的机器直接向空中辐射,称之为空气声, 建筑物中的噪声,按照产生的方式和传播的特性,分为空气声和撞击声(固体声)。空气声是由于声源的振动引起周围空气质点的振动,并以疏密相间的纵波形式向四外传播。它可以从走廊或门窗入口以及管道、孔洞缝隙处,传播到相邻或更远的房间;也可以激发起墙与楼板的振动,而把声能传递到邻室去.
通过对驾驶室内空气声、固体声和混响声的分析,说明了简易式驾驶室的声学特性对耳旁噪声的影响。
On analysis, it is explained that the efcct of air, solid and reverberant noise within the cab on the car noise is illustrated in detail.
空气声隔声是对空气传播声音的隔绝,房间之间空气声隔绝的性能是评价室内环境私密性的重要指标。
Airborne sound insulation is separation capability of air-borne sound, and the performance of airborne sound insulation between rooms is an important criterion of privacy.
海豚发出的滴答声是如何从充满空气的鼻囊传播到海水中的呢?
How did the dolphin's clicks get transmitted from its air-filled nasal sacs into the ocean water?
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