Title:
【発明の名称】車両用能動型騒音制御装置
Document Type and Number:
Japanese Patent JP2876874
Kind Code:
B2
Abstract:
An apparatus for reducing periodical noises transmitted from a noise source into a vehicle passenger compartment. The apparatus comprises control sound sources for producing control sounds in the vehicle passenger compartment, residual noise sensors for detecting the residual noises in the vehicle passenger compartment, transfer function filters modeled on transfer function between the control sound sources and the residual noise sensors, and adaptive digital filters having variable filter coefficients. A reference signal is produced in the form of a series of impulses having the same period as the noises. The transfer function filters are convoluted with the reference signal to produce reference processed signals. The adaptive digital filters are convoluted with the reference signal to generate drive signals to drive the control sound sources. The filter coefficients of the respective adaptive digital filters are updated based on the processed reference signals and the residual noises to reduce the noises in the vehicle passenger compartment.
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Inventors:
NAKAJI YOSHIHARU
HIRANO IZUHO
DOI MITSUHIRO
HAMABE TSUTOMU
MURAOKA KENICHIRO
YAMADA KOJI
HIRANO IZUHO
DOI MITSUHIRO
HAMABE TSUTOMU
MURAOKA KENICHIRO
YAMADA KOJI
Application Number:
JP4720992A
Publication Date:
March 31, 1999
Filing Date:
March 04, 1992
Export Citation:
Assignee:
NITSUSAN JIDOSHA KK
International Classes:
B60R11/02; B64C1/40; F01N1/06; G10K11/178; H03H17/00; H03H17/04; H03H21/00; H04B3/04; F02B75/02; (IPC1-7): G10K11/178; B60R11/02; B64C1/40; F01N1/06; H03H17/04; H03H21/00
Domestic Patent References:
| JP5249985A | ||||
| JP561489A | ||||
| JP4203406A | ||||
| JP3203497A | ||||
| JP2158296A | ||||
| JP1501344A |
Attorney, Agent or Firm:
Tetsuya Mori (2 others)