基于主成分分析的摩托车声品质影响因素研究

he three main characteristic factors can be extracted by analyzing the characteristic parameters of the noise samples which was acquired near the driver’s binaural position of 150cc motorcycles at different engine speed through the principal component analysis (PCA). The jury test was organized through rating scale method and the subjective preference scales of the noise samples was obtained. Then, the correlation analysis between the main characteristic factors and the subjective preference scales were carried out. It shows that modulation factor, high frequency factor, energy factor, strongly negative-correlation with the subjection preferences scales factor, have greatest influence on sound quality of 150cc motorcycles at rotating speed 1500rpm, 3000rpm and 5000rpm, respectively. Hence, pertinence measurements according to different rotating speed should be made to improve the sound quality of 150cc motorcycles.