Influence of Top Shape on Noise Reduction Effect of High-Speed Railway Noise Barrier

Abstract

The top shape of the noise barrier mainly affects the acoustic diffraction, scattering and interference, changes the acoustic transmission path, increases the number and difficulty of diffraction, and thus reduces the field noise. This paper investigates the structural parameters of T-shaped and Y-shaped noise barriers at the top, analyses the noise reduction effect of different structural noise barriers by empirical formula method, and draws a conclusion with universal reference value, which provides a reference for the selection of noise barrier and noise control of high-speed railways in China.