中文摘要：

选取第3、5、7、9、11、13、15、17、19、21共10个临界带的频率范围，针对5、10、20、30、50、100个频率成分等6种频率组合的多频声信号，进行了同一临界带的多频声和窄带白噪声的听觉感知分辨的研究．结果表明：随着频率成分个数的增加，多频声与窄带白噪声越来越难以区分；而当频率成分个数确定时，高频段临界带的多频声与窄带白噪声更难以区分．上述结果在某种程度上反映了人耳的频率分辨能力，即人耳的频率分辨率与临界带有关，临界带序号越大，频率分辨率越差，多频声的感知效果就越接近窄带白噪声．

英文摘要：

The acoustic perceptual difference between the muhitone with 5, 10, 20, 30, 50 and 100 components and the narrow-band white noise in the same critical band is resolved for the 10 critical bands of 3, 5, 7, 9, 11, 13, 15, 17, 19 and 21. The results show that the perceptual difference between muhitone and narrow-band white noise becomes more and more difficult to resolve with the increase in the number of frequency components, and that, at a certain number of frequency components, the multitone with high frequency is closer to the narrow-band white noise. The results also reflect human ears＇ ability of distinguishing frequency, that is, the frequency resolu- tion of human ears is related to the critical band. The higher the critical band index, the worse the frequency reso- lution of ears, and the closer the muhitone to the narrow-band white noise.