Vehicular active vibratory noise control apparatus

Details Vehicular active vibratory noise control apparatus Vehicular active vibratory noise control apparatus

2008-09-08

2011-11-22

Chin, Vivian (Department: 2614)

Electrical audio signal processing systems and devices

Acoustical noise or sound cancellation

Within cabin or compartment of vehicle

C381S071100, C381S071800

Reexamination Certificate

active

08064612

ABSTRACT:
A subtractor subtracts a first control signal output from a first bandpass filter from an error signal, and supplies a differential signal to a second bandpass filter. The second bandpass filter, which has a central frequency of 70 Hz, is affected by an operation of the first bandpass filter, i.e., a first control signal, which has a central frequency of 40 Hz. The first bandpass filter is not affected by an operation of the second bandpass filter, i.e., the second control signal.

REFERENCES:
patent: 5638305 (1997-06-01), Kobayashi et al.
patent: 5692055 (1997-11-01), Sano et al.
patent: 5809152 (1998-09-01), Nakamura et al.
patent: 7062049 (2006-06-01), Inoue et al.
patent: 1772852 (2007-04-01), None
patent: 2007-025527 (2007-02-01), None

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