Subjective Evaluation and Objective Quantitative Model on the Sound Quality of Automobile

This paper studies the relationship between the subjective evaluation indexes and the objective physical parameters from interior noise of vehicle cabin. Four types of vehicle real-time noises were recorded at several running speeds and later being subjectively evaluated in the testing room by pair comparison method and semantic subdivided method. Meanwhile, the psychoacoustic parameters were extracted. According to the subjective test and evaluation, a psychoacoustic objective quantificational model based on sound quality such as partialness, luxury and motility was built by means of multiple regression method. The research results indicate that loudness and sharpness are primary parameters : while loudness and sharpness are lower, then partialness and luxury are better, when the loudness is louder, then motility is stronger.