Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
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Phase Characteristics of Approximated Head-related Transfer Functions(HRTFS) Using IIR Filters on the Sound Localization

  • Kanazawa, Kenichi (Department of Information Science, Faculty of Engineering, Utsunomiya University) ;
  • Hasegawa, Hiroshi (Department of Information Science, Faculty of Engineering, Utsunomiya University) ;
  • Kasuga, Masao (Department of Information Science, Faculty of Engineering, Utsunomiya University) ;
  • Matsumoto, Shuichi (KDD R&D Laboratory) ;
  • Koike, Atsushi (KDD R&D Laboratory) ;
  • Yamamoto, Hideo (Department of Information Science, Faculty of Engineering, Utsunomiya University)
  • Published : 2000.07.01
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Abstract

We have proposed a simple method based on IIR filters for realizing sound image localization. How-ever the nonlinearity of phase characteristics of the IIR filters, which are used for sound image localization, cause decrease of the localization accuracy. In this paper we investigate the influence of phase characteristics on the sound localization. Head-related transfer functions (HRTFs) of a dummy-head are approximated by the IIR filter. We carried out sound image localization experiment with 2-loudspeaker reproduction using the approximated HRTFs. Then the errors which obtained from experiments were compared with the theoretical values which were estimated from the phase shifts of the IIR filters. As a result there was little influence of the nonlinear phase characteristics of the IIR fitters in the localization on the horizontal plane.

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