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.

The sound barrier is mainly composed of steel structure column and sound insulation screen plate. Column is the main force component of sound barrier, which is fixed on the embedded steel plate on the collision wall or track side by bolt or welding; sound insulation board is the main sound insulation member, which is fixed in the H-shaped column groove by high-strength spring card to form the sound barrier.The design of the sound barrier has been more fully considered in the elevated highway, urban light rail, subway wind load, the impact safety of traffic vehicles and all-weather open-air anticorrosion problems.It is beautiful and generous in appearance, exquisite production, convenient transportation, convenient installation, low cost, long service life, especially suitable for the elevated highway and urban light rail, subway noise prevention use, is the most ideal sound insulation and noise reduction facilities in a modern city.The sound barrier height is between 1m and 5m, and the average noise reduction in the effective area is 10~15dB (A) (125Hz~40000Hz, 1 / 3 times the frequency range), up to 20dB (A).Generally speaking, the higher the sound barrier, or the farther away from the sound barrier, the better the noise reduction effect.