Research on Sound Power Levels of Structure-Borne Noise of Viaducts Roads

Abstract

The authors studied the power levels of structure-borne noise of viaducts generated when tyres of running vehicles excite the road surface. The Acoustical Society of Japan's Research Committee on Road Traffic Noise describes the power levels of structure-borne noise are influenced by viaduct type, running speed, and vehicle weight. This paper reports on the results of organizing the power levels per running speed and number of axles, measured by grouping large vehicles by their number of axles. The study confirmed that power levels tend to larger as the speed and number of axles increase. Based on this result, the power-level setting equation applied in the prediction method of road traffic noise was revised.