Title:
ACTIVE NOISE SUPPRESSING CONTROL METHOD
Document Type and Number:
Japanese Patent JP3241264
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide an active noise suppressing control method that can perform sufficient noise suppressing control without needing much arithmetic processing so as to be able to reduce a burden on a signal processor.
SOLUTION: A speaker 12 for canceling noise with reproduced sound, and a microphone 11 for delivering an error signal based on sound difference between the speaker 12 and noise are provided in the sound field to cancel the noise. In such an active noise suppressing control method, the quantity of fluctuation, caused by internal and external disturbance factors, of a transfer function obtained from a wave equation of a sound field is approximately preset as additive perturbation to frequency, and a variable parameter of an IMC filter 15a is selected so that the absolute value of the product of the approximate set value, distance from the speaker 12 to the microphone 11 and the transfer function of the IMC filter 15a is less than 1. Vibration in the sound field is suppressed on the basis of the selected variable parameter.
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Inventors:
Hisashi Sano
Shuichi Adachi
Shuichi Adachi
Application Number:
JP9749696A
Publication Date:
December 25, 2001
Filing Date:
March 26, 1996
Export Citation:
Assignee:
Honda motor industry stock company
International Classes:
F01N1/00; F16F15/02; G05B13/02; G10K11/178; H03H17/00; (IPC1-7): G10K11/178; F01N1/00; F16F15/02; G05B13/02; H03H17/00
Domestic Patent References:
| JP4247497A | ||||
| JP7248781A | ||||
| JP7311578A |
Other References:
【文献】国際公開95/9415(WO,A1)
Attorney, Agent or Firm:
Takehiro Chiba (1 outside)