MULTI-CHANNEL INVERSE FILTERING WITH SELECTION AND ENHANCEMENT OF A LOUDSPEAKER FOR ROBUST SOUND FIELD REPRODUCTION
Shigeki Miyabe, Masayuki Shimada, Tomoya Takatani, Hiroshi Saruwatari, Kiyohiro Shikano · 2006
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 pri-mary 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 prob-lem, we propose a novel design algorithm of inverse filters that make a secondary source in the direction of the primary sound source have the largest power. In the proposed method, the user can feel the sound image toward the enhanced secondary source even around the control points. Simultaneously the accurate re-production 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 com-pared with the conventional method. 1.