| Project/Area Number |
13650453
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Measurement engineering
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| Research Institution | Utsunomiya University |
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Principal Investigator |
KASUGA Masao UTSUNOMIYA UNIVERSITY, Graduate School of ENGINEERING, PROFESSOR, 工学部, 教授 (00280909)
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| Co-Investigator(Kenkyū-buntansha) |
HASEGAWA Hiroshi UTSUNOMIYA UNIVERSITY, FACULTY OF ENGINEERING, ASSOCIATED PROFESSOR, 工学部, 助教授 (50272761)
AYAMA Miyoshi UTSUNOMIYA UNIVERSITY, FACULTY OF ENGINEERING, PROFESSOR, 工学部, 教授 (30251078)
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| Project Period (FY) |
2001 – 2002
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| Project Status |
Completed (Fiscal Year 2002)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2002: ¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 2001: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | High Presence Space / Binaural Signal Processing / Sound Reproduction / IIR Filters / Head Related Transfer Function / Sound Image Localization / Audio-Visual Interaction / 水平面全方向の音像定位 / マルチメディア / 頭部伝達関数 / 音像定位 / 視覚聴覚の認知 / 感性評価 |
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| Research Abstract |
Recent multi-media technology has made it possible to easily construct various audio-visual environments and to reproduce a three-dimensional sound field. Head-related transfer functions (HRTFs) are usually used for realizing that sound field by using FIR filters. These FIR filters have many difficult technical-items for realizing control system. In this study, we solved these problems by means of designing procedure for the HRTF using IIR filters. In conclusion, the reproducibility of a sound field was improved to the higher frequency band by using our approximation process of HRTFs in taking notice the specified frequency bands 500 Hz to 2 kHz and 8 kHz to 12.5 kHz. And furthermore, we studied audio-visual interaction from a psychological viewpoint for reproducing an auditory-visual high presence space. As the result, the sound image at the beginning of an auditory-visual stimulus presentation was more strongly captured with the visual image than that at the ending (beginning effect). In the peripheral regions, the tendency of the beginning effect was divided into two types. One is that the effect was strongly appeared in away from a gazing point. Another is that the effect was strongly appeared in the near of the point.
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