Title:
Sound emission device
Document Type and Number:
Japanese Patent JP6349899
Kind Code:
B2
Abstract:
A sound emission and collection device is provided with: a speaker (16); a filter (24) which processes a sound emission signal that is a sound signal supplied to the speaker (16); a plurality of microphones (11); a plurality of echo cancelers (32) which are provided to correspond to the plurality of microphones (11), respectively, and each cancel a recursion sound signal of sound emitted by the speaker (16) from a sound collection signal of the microphone corresponding thereto; a first integration unit which integrates adaptive filter coefficients taken out from the plurality of echo cancelers (32); a reverberation time estimation unit (41) which, on the basis of the integrated adaptive filter coefficients, estimates the reverberation time in each frequency band of a space in which the speaker (16) and the plurality of microphone (11) are present; and a calculation unit which, on the basis of the estimated reverberation time, specifies a frequency band in which the reverberation time is long from the sound emission signal, and calculates and sets, in the filter, a filter coefficient by which power in the specified frequency band is suppressed.
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Inventors:
Ukai Norifumi
Takashi Yamakawa
Takashi Yamakawa
Application Number:
JP2014083209A
Publication Date:
July 04, 2018
Filing Date:
April 14, 2014
Export Citation:
Assignee:
Yamaha Corporation
International Classes:
H04R3/02; H04M1/60; H04M3/56; H04R1/40; H04R3/00
Domestic Patent References:
| JP64029094A | ||||
| JP10150343A |
Attorney, Agent or Firm:
Tatsuichi Murakami
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