The Study of Sound Quality for Car Compressor

Abstract

As cars become more and more quiet the sound quality of rotary components such as car compressor becomes more important in the customer’s subjective perception of passenger car quality. This needs a new evaluation method which is not only the traditional method like sound pressure level but also Psychoacoustic Metrics to focus the specification of component sounds. This paper on one hand analyzed one car’s abnormal noise reason through the tests, found the main problem frequency band of the compressor, and on the other hand studied the compressor’s psychoacoustic metrics. In this paper the countermeasure of solving this problem was also given, and then noise level and psychoacoustic parameters are compared. Both objective evaluation and subjective evaluation showed that the compressor with the solution not only reduced the sound pressure level, but also improved the car sound quality greatly.

Dimensions of Vehicle Quality: Scale Development Study

“…Zhuang and Zuo (2014), who focused also on car interior sound quality, found that sound quality was better than sound pressure and that sound sharpness was more disturbing than volume. Hou, Han, and Xu (2012) used psychoacoustic metrics instead of conventional interior sound measuring methods, which they believed fell short of evaluating interior sound quality. They specified the frequency bands of the car compressor.…”