Noise Source Localization Investigation in High Speed Train Based on Microphone Array
The method to use planar array to identify the noise sources in high speed train is described. Through investigating the noise sources in high speed train, it is shown that the important noise sources are situated at windshield, door, air outlet, joints between headwall and sidewall. The spectra characteristics and sound pressure contour of these noise sources are obtained. The sound energies of these noise sources are concentrated in the frequency range of 0-1000 Hz mainly. Some effective countermeasures against interior noise of high speed train are suggested. Interior train noise decreases the comfort for the passengers inside the vehicle. As speeds increase, noise inevitably also increases. It has been known that rolling noise levels increase at a rate of 301ogl0v (with v the speed). The noise from aerodynamic sources increases more rapidly with speed, increasing at typically around 601ogl0v, and above 300 km/h aerodynamic noise becomes significant
high speed train interior noise source localization microphone array
Zhang Xiaofeng Xiao Yougang Deng Helian
Changsha Environmental Protection Vocational Technical College, Changsha, 410004, China School of Traffic & Transportation Engineering, Central South University, Changsha 410075, China Loudi Vocational Technical College, Hunan Loudi 41700, China
国际会议
湘潭
英文
285-291
2011-07-19（万方平台首次上网日期，不代表论文的发表时间）