关键词: 声品质；越野车；响度；尖锐度；小波图

Abstract: The closure door sound quality of off-road vehicle is distinct from that of other vehicle categories due to specialized functions. This paper initiates with the examination of off-road vehicle closure door sound quality, introduces two assessment methodologies. The subjective appraisal and objective testing is employed on an off-road vehicle. Wavelet diagrams are analyzed to pinpoint the problems raised in the evaluation, the rectification schemes of improving the sealing strip, adding butyl rubber film in the weak place of dynamic stiffness, and optimizing the design of the door lock are given and verified. After the test verification and comparison, it is found that the sound quality has been significantly improved, which provides reference and reference ideas for solving related problems in the future, and has certain value in engineering and commercial applications.

Key words: sound quality; off-road vehicle; loudness; sharpness; wavelet diagrams