US 7,369,663 B2 May 6, 2008
(54) METHOD OF CREATING REVERBERATION BY ESTIMATION OF IMPULSE RESPONSE
(75) Inventor: Satoshi Sekine, Hamamatsu (JP)
(73) Assignee: Yamaha Corporation, Hamamatsu-Shi (JP)
( * ) Notice: Subject to any disclaimer, the term of this patent is extended or adjusted under 35 U.S.C. 154(b) by 650 days.
(21) Appl. No.: 10/424,045
(22) Filed: Apr. 25, 2003
(65) Prior Publication Data
US 2003/0202667 Al Oct. 30, 2003
(30) Foreign Application Priority Data
Apr. 26, 2002 (JP) 2002-126739
(51) Int. CI.
H03G 3/00 (2006.01)
G10H 7/00 (2006.01)
U.S. CI 381/63; 381/61; 84/630;
Field of Classification Search 84/630,
84/707, DIG. 26; 381/63, 61 See application file for complete search history.
U.S. PATENT DOCUMENTS
5,025,472 A 6/1991 Shimizu et al. 5,317,104 A 5/1994 Frost 5,452,360 A 9/1995 Yamashita et al.
The present invention is directed to creating sound reverberation. In accordance with a preferred embodiment, an apparatus estimates an impulse response for use in reproduction of a sound in a desired acoustic space. In particular, the apparatus collects space information concerning an acoustic space and point information indicating positions of a sound generation and reception points in the acoustic space, estimates a set of acoustic ray paths of the sound traveling from the sound generation point to the sound reception point, acquires directivity information indicating an acoustic directivity of the sound generation point and the sound reception point, estimates an acoustic intensity of each acoustic ray path and weights each acoustic intensity by the acquired directivity information, and determines the impulse response based on directions of the respective acoustic ray paths toward the sound reception point and the weighed acoustic intensities of the respective acoustic ray paths.
12 Claims, 11 Drawing Sheets