Journal of South China University of Technology (Natural Science Edition) ›› 2013, Vol. 41 ›› Issue (12): 120-124.doi: 10.3969/j.issn.1000-565X.2013.12.020

• Physics • Previous Articles     Next Articles

Analysis and Evaluation of Minimum- Phase Approximation of Headphone- to- Ear Canal Transfer Function

Zhong Xiao- li1,2 Ming Fang1 Xie Bo- sun1,2   

  1. 1.Department of Physics,South China University of Technology,Guangzhou 510640,Guangdong,China;2.State Key Laboratory of Subtropical Building Science,South China University of Technology,Guangzhou 510640,Guangdong,China
  • Received:2013-04-01 Revised:2013-08-19 Online:2013-12-25 Published:2013-11-19
  • Contact: 钟小丽(1975-)，女，博士，副教授，主要从事心理声学、声信号处理等的研究． E-mail:xlzhong@scut.edu.cn
  • About author:钟小丽(1975-)，女，博士，副教授，主要从事心理声学、声信号处理等的研究．
  • Supported by:

    国家自然科学基金资助项目(11004064);华南理工大学亚热带建筑科学国家重点实验室开放课题(2013KB23)

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Abstract:

In order to simplify the headphone equalization processing in headphone- presented virtual auditory re-plays,the minimum- phase approximation of headphone- to- ear canal transfer functions (HpTFs) was analyzed andevaluated.In the investigation,first,HpTFs for 20 human subjects and three types of headphones were repeatedlymeasured by using the blocked ear canal technique.Then,the reasonability of the minimum- phase approximation ofHpTFs was discussed through correlation analysis and psychoacoustic experiment.Analytical results indicate thatthe mean correlation coefficient between the measured and the minimum- phase- approximated HpTFs is 0.95 in thefrequency range from 0 to 12kHz,which validates the reasonability of the minimum- phase approximation of HpTFs.Moreover,the results of psychoacoustic experiment further demonstrate that there is no audible difference betweenthe measured and the minimum- phase- approximated HpTFs at the frequency below 12kHz.

Key words: virtual auditory display, transfer function, headphone, ear canal, headphone equalization, minimum-phase approximation

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