Author(s)

L. Li, Q. Zhu, Y. Xie

Abstract

Vehicle exterior noise has a big effect on residents living alongside rail lines. In order to reduce the influence of metro lines on the environment, elastic rail fasteners have been widely used. However, even though the equivalent sound level A is under the limitation of the national standard; people still complain that the noise affects their lives. In this paper, vehicle exterior noise experiments were performed on two sections which had different types of rail fasteners. The spectrum characteristics were analyzed using different weighted sound level. Furthermore, the characteristics were analyzed by a sound quality objective evaluation based on psychoacoustic parameters. The distribution and influence degree can be preliminarily determined. The results showed that the elastic fastener had an obvious effect on vehicle exterior noise attenuation. Loudness can better evaluate the vehicle exterior noise in different elastic fastener sections, truly reflecting people’s subjective sensation as well.

Keywords

vehicle exterior noise, noise quality, elastic track, psychoacoustic