Noise barrier, it is mainly used for highway, highway, elevated road and other noise acoustic noise reduction. Divided into pure acoustic reflection noise barrier, and the combination of sound absorption and sound insulation composite sound barriers, the latter is more effective sound insulation. Means to reduce traffic noise impact on residents and set up near the rail and road side wall type structures. Sound barriers, also known as sound barriers. Between the source and receiver inserts a facilities, make the sound waves spread has a significant additional damping so as to abate the noise in the receiver in a certain area, such facilities are called noise barrier. Divided into traffic noise barriersthe equipment noise attenuation of noise barriers, industrial factory boundary noise barriers is the use of various types of road and highway noise barrier at most places.