Viaduct roads are generally located at a relatively high position, so when vehicles are driving on them, the noise source generated is at a relatively high height, which will have a great noise impact on some buildings that are relatively close and have low floors. Viaduct sound barriers are currently a commonly used method to deal with bridge noise. The planning of viaduct sound barriers needs to consider the surrounding environment. For existing bridges, the background noise value of the representative sound point can be measured on site. The following is an introduction to the material specifications and characteristics of "viaduct sound barriers", I hope it will be helpful to everyone!