关键词: 声学, 脉冲声, 声品质, 响度, 尖锐度, 时频分析

Abstract: Currently, research of sound quality of automobiles is mainly focused on the steady sound, and there are very few methods for transient sound quality evaluation. In addition, traditional FFT method is often adopted in sound signal processing, while the transient property of the acoustic signal has not been considered adequately. Automotive door closing sound is a transient impulse sound, and the quality of door closing sound can reflect the quality of vehicles. In this paper, first of all, the quality of door closing sound of some types of vehicles is evaluated using traditional evaluation parameters. Then, the wavelet transform method is used to analyze the sound signal of the door closing sound in time frequency domain. It is indicated that the traditional parameters such as loudness, sharpness, roughness, and so on can not sufficiently reflect the sound quality characteristics of transient sound, while the time-frequency analysis is a good complement for the sound quality evaluation. However, selection of the evaluation parameters remains a problem for further study.

Key words: acoustics, impulse sound, sound quality, loudness, sharpness, time-frequency analysis