摘要
针对汽车关门声品质评价问题,基于Hilbert-Huang变换,研究提出一个新的声品质评价参数—SMHHT(Sound Metric based on Hilbert-Huang Transform)。在进行汽车关门声品质评价时,先采集汽车关门声音信号,进行EMD分解和Hilbert变换,再根据得到的瞬时频率对相应的IMF分量进行临界频率带计权并计算其能量,即可得到新的声品质评价参数SMHHT。为了验证该参数的有效性,将该参数和传统的声品质评价参数(响度,尖锐度)分别与主观评价结果进行相关性分析,结果表明提出的声品质评价参数SMHHT与主观评价结果有更高的相关性,能更准确的评价汽车关门声品质。
A new parameter for sound quality evaluation of car＇s door-slamming, sound metric based on Hilbert-Huang transform （SMHHT） was developed. At first, the sound signals of door-slamming were sampled, decomposed by EMD and transformed by Hilbert Transform. Then, using the instantaneous frequency, the corresponding IMF components were weighted by critical frequency band, their energies were calculated, and the new sound metric SMHHT for sound quality evaluation was determined. In order to verify the effectiveness of the new sound metric, correlation analyses between the new sound metric and the subjective evaluation results, and between the traditional sound quality evaluation parameters, including loudness and sharpness, and the subjective evaluation results were carried out respectively. The result shows that the new sound metric proposed in this paper has a higher correlation with the subjective evaluation values than the other. Thus, the new sound metric can evaluate the door-slamming sound quality more accurately.
出处
《噪声与振动控制》
CSCD
2013年第3期132-137,共6页
Noise and Vibration Control
基金
湖南大学汽车车身先进设计制造国家重点实验室自主课题(60870002)项目资助
