Title:
SOUND PROCESSING DEVICE AND CONTROL METHOD OF SOUND PROCESSING DEVICE
Document Type and Number:
WIPO Patent Application WO/2018/211698
Kind Code:
A1
Abstract:
This sound processing device is provided with: a low-frequency reduction unit which transitions between a first state for outputting a signal in which components in an acoustic signal that fall below a first frequency are reduced and a second state for outputting a signal in which components in the acoustic signal that fall below a second frequency, higher than the first frequency, are reduced; a class D amplifier which amplifies the signal after output from the low-frequency reduction unit; a state determination unit which determines whether or not the strength of a low-frequency component in the acoustic signal exceeds a threshold value; and an operation control unit which controls the low-frequency reduction unit to assume the first state if the determination result from the state determination unit is negative, and controls the low-frequency reduction unit to assume the second state if the determination result is positive.
Inventors:
GOTO MITSUTAKA (JP)
YANAIKE KAZUHIRO (JP)
YANAIKE KAZUHIRO (JP)
Application Number:
PCT/JP2017/018877
Publication Date:
November 22, 2018
Filing Date:
May 19, 2017
Export Citation:
Assignee:
YAMAHA CORP (JP)
International Classes:
H03F3/217; H04R3/00
Foreign References:
| JP2005509306A | 2005-04-07 | |||
| JP5233309B2 | 2013-07-10 | |||
| JP2014154959A | 2014-08-25 | |||
| JPH10126893A | 1998-05-15 |
Attorney, Agent or Firm:
OHBAYASHI, Akira et al. (JP)
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