【作者】 闫靓； 玉昊昕； 陈克安；

【Author】 YAN Liang,YU Hao-xin,CHEN Ke-an (College of Marine Engineering,Northwestern Polytechnical University,Xi’an 710072,China)

【机构】 西北工业大学航海学院环境工程系；

【摘要】 本文重点关注车辆噪声的时频分布及其对烦恼度的影响。提出以细化短时傅立叶变换研究车辆噪声的时频分布。在此基础上,选取两类典型时频,人工合成车辆在"怠速"和"匀速经过"两种状态下的噪声。随后,组织多位评价者,采用等级评价法获得合成音的烦恼度。通过改变合成参数,研究时频分布对车辆噪声烦恼度的影响机制。研究发现:1)车辆的怠速噪声由带通噪声和纯音构成。怠速合成音烦恼度与纯音和带通噪声的中心频率无关;与通带带宽明显正相关,并随纯音数量的增加而接近线性相关。合成音烦恼度亦随纯音成分的增加而增大。2)车辆的匀速经过噪声可由带通噪声与纯音多普勒效应经时域叠加获得。匀速经过合成音的烦恼度与行驶速度负相关,与经过时刻和多普勒纯音的频率无关。更多还原

【Abstract】 This paper describes and reconstructs time-frequency distribution features of road-vehicle noise,and report a laboratory experiment investigating the relationship between synthesized parameters and subjective annoyance with artificial road-vehicle sounds.Scale values of subjective annoyance were measured by Magnitude Estimation.Results showed that:1) when sounds are roughly equivalent in exposure intensity,widely different time-frequency properties can evoke various degrees of subjective annoyance;2) an obvious positive correlation between subjective annoyance of synthesized idling sounds and the bandwidth of its band-pass noise can be observed,but the center frequency of band-pass noise and the frequencies of pure tones show no strong relationship with its annoyance;3) there has a negative correlation between annoyance from synthesized passing-by noise and its designed speed,but pure tone frequency and the particular passing time have little to do with subjective annoyance of such noise.更多还原