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Multi-Channel Inverse Filtering with Selection and Enhancement of a Loudspeaker for Robust Sound Field Reproduction
- Author(s)
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- Shigeki Miyabe, (Nara Institute of Science and Technology)
- Masayuki Shimada, (Nara Institute of Science and Technology)
- Tomoya Takatani, (Nara Institute of Science and Technology)
- Hiroshi Saruwatari, (Nara Institute of Science and Technology)
- Kiyohiro Shikano, (Nara Institute of Science and Technology)
- Topics
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- Active noise control, sound reproduction and hearing aids
- Noise and acoustic environments and characteristics
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Abstract
This paper describes a new sound field reproduction strategy, where the system can give accurate sound images if a user is at a specific position, and still provides the direction of the primary source if the user moves. The existing methods do not take into account the accurate reproduction outside the specific control points, and if the user moves from the control points, he cannot feel the accurate sound image. To solve this problem, we propose a novel design algorithm of inverse filters that makes the power of the specific secondary source largest. In the proposed method, the user can feel the sound image toward the enhanced secondary source even around the control points. Simultaneously the accurate reproduction at the control points can be achieved as well as the conventional method. The subjective evaluation shows that the proposed method is more robust against the user's move compared with the conventional method.
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