Fast calculation system specialized for head-related transfer function based on boundary element method

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作者
Otani, Makoto [1 ]
Ise, Shiro [2 ]
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[1] Department of Architecture and Architectural Engineering, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyou-ku, Kyoto, Kyoto, 606-8501, Japan
[2] Department of Urban and Environment Engineering, Graduate School of Engineering, Kyoto University, Yoshida-Honmachi, Sakyou-ku, Kyoto, Kyoto, 606-8501, Japan
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Recently; development of a numerical calculation of the head-related transfer function (HRTF) has been conducted using a computer model of a human head and the boundary element method. The reciprocity theorem is incorporated into the computational process in order to shorten the computational time; which is otherwise very long. On the other hand; another fast HRTF calculation method for any source position; which is realized by calculating factors independent of the source position in advance; has been suggested by the authors. Using this algorithm; the HRTF for any source position can be obtained in a few seconds with a common PC. The resulting HRTFs are more precise and are calculated faster than those by using the reciprocity theorem. However; speeding the process up even further is required in order to respond to a head movement and rotation or to moving sources during binaural sound reproduction. In this paper; a faster calculation method by incorporating a time domain operation into the authors' previous algorithm is proposed. Additionally; the new formulation; which eliminates the extra computational time in the preprocess; is proposed. This method is shown to be faster than the previous ones; but there are some discrepancies at higher frequencies. © 2006 Acoustical Society of America;
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页码:2589 / 2598
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