Journal of South China University of Technology (Natural Science Edition) ›› 2010, Vol. 38 ›› Issue (3): 138-142.doi: 10.3969/j.issn.1000-565X.2010.03.025

• Physics • Previous Articles     Next Articles

Resolution of Acoustic Perceptual Difference Between Multitone and Narrow-Band White Noise

Xie Zhi-wen  Che Hong-feng   

  1. School of Science, South China University of Technology, Guangzhou 510640, Guangdong, China
  • Received:2009-03-12 Revised:2009-08-18 Online:2010-03-25 Published:2010-03-25
  • Contact: 谢志文（1962-），男，副教授，主要从事心理声学、声信号处理研究． E-mail:phzhwxie@scut．edu．cn
  • About author:谢志文（1962-），男，副教授，主要从事心理声学、声信号处理研究．
  • Supported by:

    国家自然科学基金资助项目（10874048）

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Abstract:

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.

Key words: critical band, muhitone, narrow-band white noise, acoustic perceptual difference