关键词: 声学, 轻轨, 车内实验, 噪声规律, 频谱特性

Abstract: Through noise testing experiment of light rail vehicles interior, analyzing passengers stand and sit high station noise spectrum characteristics、light rail vehicles interior noise source, that gets acoustic field distribution rule of light rail vehicle interior and noise spectrum characteristics. the main noise sources in light rail vehicles is wheel/rail noise, frequency range mainly concentrated in 400-2000 Hz. Light rail vehicle meeting frequently at run time, so this paper studies interior noise spectrum change when they are meeting, concludes that meeting will enhance interior noise, and air power noise can’t be ignored to light rail vehicle department. The analysis above provides basis for noise reduction, and may be helpful for further improvement of light rail vehicle interior acoustic environmental quality.