Insertion Loss of Finite Length Barriers for Conventional Railway Noise

Abstract

In order to investigate the insertion loss of finite length barriers for conventional railway noise, a numerical study was performed using a prediction model that considers one diffraction path over a barrier for each point source, where changing the length and height of the barrier, the positions of the lane and receivers, and source directivity. Subsequently, in the simple calculation of noise propagation from a line source, an approximation of the insertion loss of a finite length barrier, which considers the source directivity and the visible angle of the barrier, was validated, and applied to examine the requirements of barriers length. Furthermore, a field measurement was carried out around the end of a barrier along a railway, which confirms a good correspondence between measured and calculated insertion loss.