关键词: 传递路径分析, 声品质目标, 声品质模型, 贡献量

Abstract: The traditional frequency-domain transfer path analysis method is easy to obtain the spectrum characteristics of vibration signals, but it is difficult to combine with the subjective feelings in the vehicle, which leads to the low efficiency of analysis and the shortcomings of misjudgement. In order to solve this problem, the correlation of interior noise quality based on time-domain transfer path analysis method is studied. Based on the regression equation of subjective evaluation and objective data of sound quality, the evaluation model of sound quality is established, and the target parameters are set. Then the reliable analysis model of transmission path is obtained by using the method of time-domain transmission path analysis. Finally, through analyzing and calculating the time-domain characteristics of power train noise, the in-vehicle contribution of different excitation sources is obtained, and the transmission path is optimized. As a result, the second-order noise sound pressure level of the engine is reduced by 5 dB, and the interior sound quality of the vehicle is improved.

Key words: Transfer function analysis, sound quality targets, sound quality model, contributions