我国目前对噪音污染的治理方法主要有两种：一种是将水泥路

面的改柏油路面第二种是在距离住宅窗户较近的道路两侧安装隔音

屏障。但效果均不理想。路面改变只可降低汽车行驶摩擦声的3～5

分贝左右。至于安装隔音屏障．由于声波的衍射特性，声音的传播可

以跨越隔音屏障，在中频，高频声波传播中，遇到难以穿透的障碍物

时，背面就有一个声波微弱的影区。所以此举只对相近楼层有所缓

解，对更高楼层的住户而言，效果并不明显-Our current treatment methods for noise pollution, there are two: one is the change of the cement road asphalt surface of the second is near the road at a distance of residential windows installation of noise barriers on both sides. But the results are not satisfactory. The road surface changes can only be reduced by about 3 to 5 db of the friction sound of car driving. As for the installation of noise barriers. Due to the diffraction characteristics of the acoustic sound propagation across the noise barriers encountered impenetrable barrier in the intermediate frequency, high frequency sound wave propagation in the back there is a weak acoustic shadow zone. Eased so move only close to the floor tenants on higher floors, the effect is not obvious