Title:
An active muffling device and a method
Document Type and Number:
Japanese Patent JP6125389
Kind Code:
B2
Abstract:
According to an embodiment, an active noise-reduction apparatus includes following elements. The microphone converts a sound including a target sound into an error signal. The control filter generates a control signal in accordance with a control characteristic. The first control effect estimation filter converts the control signal into a first signal in accordance with an estimated secondary path characteristic. The second control effect estimation filter converts the control signal into a second signal in accordance with a processed secondary path characteristic obtained by shortening a delay of the estimated secondary path characteristic. The updating unit updates the control characteristic based on the error signal, the first signal, and the second signal.
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Inventors:
Tatsuhiko Goto
Application Number:
JP2013197034A
Publication Date:
May 10, 2017
Filing Date:
September 24, 2013
Export Citation:
Assignee:
Toshiba Corporation
International Classes:
H04R3/00
Domestic Patent References:
| JP2012003240A | ||||
| JP8190388A | ||||
| JP2000259159A | ||||
| JP8044377A |
Attorney, Agent or Firm:
Kurata Masatoshi
Yoshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Takao Ako
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
Yoshihiro Fukuhara
Makoto Nakamura
Nobuhisa Nogawa
Takashi Mine
Naoki Kono
Katsu Sunagawa
Morisezo Iseki
Takao Ako
Tadashi Inoue
Tatsushi Sato
Takashi Okada
Mihoko Horiuchi
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