Title:
ACTIVE NOISE CONTROL SYSTEM
Document Type and Number:
Japanese Patent JP2022138484
Kind Code:
A
Abstract:
To provide an "active noise control system" that reduces an influence of disturbance to the generation of noise-canceling sound.SOLUTION: A signal e(z) obtained by subtracting echo-canceling sound from output of a second microphone 22 is used as an error of an echo cancellation adaptive filter 33 and a noise cancellation adaptive filter 31, and output of a first sound source device 13 is added to the signal e(z) and output from a first speaker 11. The echo cancellation adaptive filter 33 generates echo-canceling sound from an addition signal of output of a second sound source device 23 and output of a first microphone 12 such that the signal e(z) is minimized. The noise cancellation adaptive filter 31 generates noise-canceling sound from the output of the first sound source device 13 such that the signal e(z) is minimized, and outputs the noise-canceling sound from a second speaker 21.SELECTED DRAWING: Figure 2
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Inventors:
TAJI RYOSUKE
Application Number:
JP2021038392A
Publication Date:
September 26, 2022
Filing Date:
March 10, 2021
Export Citation:
Assignee:
ALPSALPINE CO LTD
International Classes:
G10K11/178; B60R11/02; H04R3/02
Attorney, Agent or Firm:
Katsushi Sato
Masahiko Amagai
Kazuyuki Tachibana
Kyozo Katayose
Masahiko Amagai
Kazuyuki Tachibana
Kyozo Katayose