Sound quality analysis of slide adjuster for automotive power seat using stepwise regression

摘要

This study has analyzed the effect of noise sources of power seat slide adjuster on sound quality and human sensitivity through statistical methods. First, sound quality analysis using sound quality metrics was performed to analyze objective data. Next, the subjective evaluation of sound quality was performed by a jury test. There were two types of sound sources used for the jury test; one was two original sounds measured in the operating test and the other one was eight virtual sound sources that were produced by amplifying a specific frequency of original sounds. It was designed to derive the causal relationship between each noise source and human sensitivity. Thirdly, we analyzed the correlation between the sound quality metrics and the sound pressure level of the noise source through the factor analysis. As a result, four independent variables were derived. Lastly, stepwise regression analysis was performed using four independent variables and the results of the jury test. The derived regression models had considerable explanatory power. From this, it was possible to understand the influence of the noise source of the seat slide adjuster on the sound quality and human sensitivity.