Sound barrier is mainly used for the noise reduction of highway, highway, elevated composite road and other noise sources.It is divided into pure sound insulation reflection type of sound barrier and sound absorption and sound insulation combined with the composite sound barrier, the latter is a more effective sound insulation method.It refers to the wall structure set on the side of the highway and railway to reduce the impact of traffic noise on the nearby residents.Sound insulation walls are also known as sound barriers.A facility inserted between the sound source and the recipient with a significant additional attenuation of sound wave propagation attenuates the noise effects within a certain area where the recipient is located, and such a facility is known as a sound barrier.It is divided into traffic sound insulation sound barrier, equipment noise attenuation sound barrier, industrial factory boundary sound insulation barrier, highway and highway is the most use of various types of sound barrier place.