Title:
ハウリング抑圧装置、プログラム、集積回路、およびハウリング抑圧方法
Document Type and Number:
Japanese Patent JP4767166
Kind Code:
B2
Abstract:
Howling, which occurs when amplifying a target sound collected by a first microphone through an amplification section and outputting the amplified sound as an intensified sound from a loudspeaker, is suppressed using a first and second acoustic signal. A first power spectrum is produced according to the first acoustic signal output from the first microphone collecting a sound. A second power spectrum is produced according to the second acoustic signal of a sound including at least the intensified sound and not including the target sound. Then, the first acoustic signal is filtered based on the first power spectrum, and the second power spectrum to output only an acoustic signal of the target sound to the amplification section.
Inventors:
Takero Kanamori
Takeshi Kawamura
Tomomi Matsuoka
Takeshi Kawamura
Tomomi Matsuoka
Application Number:
JP2006514700A
Publication Date:
September 07, 2011
Filing Date:
June 07, 2005
Export Citation:
Assignee:
Panasonic Corporation
International Classes:
H04R3/02; H04R27/00
Domestic Patent References:
| JPH08223274A | 1996-08-30 | |||
| JPH0833091A | 1996-02-02 | |||
| JPS63135100A | 1988-06-07 | |||
| JPH11146484A | 1999-05-28 |
Attorney, Agent or Firm:
Shiro Ogasawara