车辆噪声音质的影响因素有舒适性因子、悦耳感因子和清楚感因子等。愉快感与粗糙感密切相关。粗糙感是由噪声的时间包络线起伏引起的主观评价,并用粗糙级对它作定义。粗糙级可由噪声的时间包络线谱进行量化,以dB为单位,对车辆噪声音质的主观评价进行量化,从而使噪声音质评价方法更加完善。 Vehicle noise quality factors are comfort factor, comfort factor and a clear sense of flu factor. Pleasure and roughness are closely related. Roughness is a subjective assessment of fluctuations caused by the time envelopes of noise, and is defined by roughness. The roughness level can be quantified by the temporal envelope of the noise, and the subjective evaluation of the vehicle noise quality is quantified in dB, so that the noise quality assessment method is further improved.