Based on the sound energy superposition formula of incoherent sound sources,we proposed a method and process for analyzing the contribution of the main sound sources in the driver′s cab.During the locomotive trial-manufacture stage,the sound level in the driver′s cab under different working conditions is tested.By calculating the sound energy difference and sound energy density,the contributions of three main sound sources,namely the noise of power equipment and air conditioning fans,running wind noise,and wheel-rail noise,are determined and ranked based on the percentage of sound energy density.This method can accurately evaluate the effectiveness of noise reduction schemes and provide guiding principles for developing noise reduction optimization schemes.
关键词
声源贡献量/声能叠加/声能密度
Key words
sound sources contribution/sound energy superimposition/sound energy density
维普
万方数据