Title:
【発明の名称】能動雑音消去装置
Document Type and Number:
Japanese Patent JP2889114
Kind Code:
B2
Abstract:
An active adaptive noise canceller (100) that does not require a training mode and operates over an extended noise bandwidth. The canceller partitions the noise bandwidth into frequency sub-bands, and multiple adaptive filter channels (120, 140) are employed, one for each sub-band, to cancel noise energy in the respective sub-bands. Each channel includes bandpass filters (121, 130) to restrict the channel to operation over only the particular sub-band, and delays are inserted in the operation of the filter weight updating. Because each channel is stable over its sub-band, the canceller operates over the extended noise bandwidth of all the sub-bands.
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Inventors:
HOORU ERU FUENTATSUCHI
AREN KEI ROO
AREN KEI ROO
Application Number:
JP8895294A
Publication Date:
May 10, 1999
Filing Date:
April 26, 1994
Export Citation:
Assignee:
REISEON CO
International Classes:
F01N1/00; G10K11/178; H03H17/00; H03H17/02; H03H21/00; (IPC1-7): G10K11/178; F01N1/00
Domestic Patent References:
| JP3284098A |
Other References:
【文献】米国特許5117401(US,A)
Attorney, Agent or Firm:
Takehiko Suzue