关键词: 声学, Hilbert-Huang变换, 汽车NVH, 响度, 尖锐度, 声品质评价参数

Abstract: Sound quality has become a new developing research area of vehicle NVH（Noise Vibration and Harshness）. For sound quality evaluation of door-slamming，a new sound metric SMHHT(Sound Metric based on Hilbert-Huang Transform) is developed based on Hilbert-Huang Transform. First, the sound signals of door-slamming are sampled and decomposed by EMD and transformed by Hilbert Transform. Then based on the instantaneous frequency, the corresponding IMF components can be weighted by critical frequency band and be calculated its energy, and the new sound metric SMHHT is calculated. In order to verify the effectiveness of the new sound metric, correlation analysis is carried out between the new sound metric and the subjective evaluation results，as well as the traditional sound quality evaluation parameters, including loudness, sharpness, and the subjective evaluation values. The result shows that the new sound metric proposed in this paper has the higher correlation with the subjective evaluation values, so the new sound metric can evaluate the door-slamming sound quality more accurately.