广州空压机匠心厂

金属声屏障的减噪量与噪声的频率、屏障的高度以及声源与接收点之间的距离等因素有关。金属声屏障的减噪效果与噪声的频率成分关系很大，对大于2000Hz的高频声比800一1000Hz左右的中频声的减噪效果要好，但对于25Hz左右的低频声．则由于声波波长比较长而很容易从屏障上方绕射过去，所以效果就差。通常，金属声屏障对高频声可降低l0—15dB。金属声屏障的高度，可根据声源与接收点之间的距离设计，金属声屏障的高度增加一倍，则其减噪量可增加6dB，为了使金属声屏障的减噪效果较好，应尽量使金属屏障靠近声源或接收点。

The noise reduction of the metal sound barrier is related to the frequency of the noise, the height of the barrier and the distance between the sound source and the receiving point. The metal sound barrier large frequency components of the noise reduction effect and noise, to more than 2000Hz high frequency sound noise is better than a 800 reduction if sound about 1000Hz, but for the low frequency sound around 25Hz. Due to the acoustic wavelength is relatively long and easily over the barrier above the diffraction effect is bad, so. In general, the metal sound barrier can reduce the high frequency sound by l0 - 15dB. The height of metal noise barrier can be designed according to the distance between the sound source and the receiving point, and the noise barrier can be increased by 6dB when the height of the metal barrier is doubled. In order to make the noise reduction effect of the metal noise barrier better, we should try to make the metal barrier close to the sound source or the receiving point.