Active noise control apparatus, active noise control method and program
AssigneePioneer Corporation
InventorsManabu NOHARA, Akihiro ISEKI
Life of this patent
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Abstract
The active noise control device detects noise, and delays a phase of a detected noise signal in a low frequency band. In a non-closed-type noise control device, since there occurs such a phenomenon that the phase of the noise signal advances in the low frequency band, the correction unit performs a correction to cancel the phase advance by delaying the phase. By outputting the noise reduction sound based on the phase-corrected noise signal, the noise is reduced.
Claims15
An active noise control device formed in a non-closed structure and performing a feedback control, comprising:
- a noise detection unit configured to detect noise;
- a correction unit configured to delay a phase of a detected noise signal in a low frequency band;
- and
- an output unit configured to output a noise reduction sound which reduces the noise based on the corrected noise signal.
An active noise control method performed by an active noise control device formed in a non-closed structure and performing a feedback control, comprising:
- a noise detection process to detect noise;
- a correction process to delay a phase of a detected noise signal in a low frequency band;
- and
- an output process to output a noise reduction sound which reduces the noise based on the corrected noise signal.
A non-transitory computer-readable medium storing program executed by an active noise control device formed in a non-closed structure and performing a feedback control, the program causing the computer to function as:
- a noise detection unit configured to detect noise;
- a correction unit configured to delay a phase of a detected noise signal in a low frequency band;
- and
- an output unit configured to output a noise reduction sound which reduces the noise based on the corrected noise signal.
(canceled)
Dependencies are inferred from the claim text.