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

摘要： 目前汽车声品质的研究多针对稳态声，非稳态声声品质评价方法欠缺，且噪声信号处理多采用FFT等传统方法，未充分考虑其非稳态特性。汽车车门关闭声为一种瞬态的非稳态噪声，关门声声品质的好坏常常能反映出整车的品质。以多款汽车关门声为研究对象，采用常用的声品质评价参数对其进行声品质分析。另外，采用小波变换方法，对关门声声信号进行时频分析，并对多款车的车门关闭声进行声品质评价，提出仅仅用响度、尖锐度等传统评价参量并不能很好反映非稳态噪声声品质特性，而通过时频分析则能对其进行很好的补充，但评价参量的确定还有待进一步研究，最后，提出下一步的研究方向和内容。

关键词: 声学, 脉冲声, 声品质, 响度, 尖锐度, 时频分析