关键词: 声学, 地铁, 粗糙度, 轨道衰减率, 混响, 隔声量

Abstract:

The main noise source of the metro is the wheel-rail noise. This noise will generate a reverberation sound field in the tunnel after reflecting from the tunnel’s wall and then passed into the carriage through the carriage’s structure which will affect the riding comfort. In this paper, the qualitative analysis about the influence fact of the wheel-rail noise in classical theories and relevant standards were studied. Using the date tested in the domestic metro line to make a quantitative analysis on each factor’s specific impact on the noise inside the carriage. On this basis, comprehensive control suggestions on the noise inside the metro were put forward to provide conference for the subway route planning.