Patent ID: 8064612
Filing Date: 2011-11-22
Classification: G10K

Abstract:
1. A vehicular active vibratory noise control apparatus comprising: a first bandpass filter for extracting a first control signal relative to a first frequency component of a road noise; a first phase adjuster for generating a first canceling signal by adjusting said first control signal in phase; a canceling sound output unit for outputting a first canceling sound based on said first canceling signal; an error signal detector for detecting, as an error signal, a residual vibratory noise due to interference between said first canceling sound and the road noise at an evaluation point; wherein said first bandpass filter is supplied only with said error signal, which is input thereto, and extracts the first control signal from said error signal; a second bandpass filter for extracting a second control signal relative to a second frequency component of the road noise; a second phase adjuster for generating a second canceling signal by adjusting said second control signal in phase; and an adder for adding said first canceling signal and said second canceling signal together into a sum signal, and outputting the sum signal to said canceling sound output unit; wherein said canceling sound output unit outputs a canceling sound based on said sum signal; said error signal detector detects, as said error signal, a residual vibratory noise due to interference between said canceling sound and the road noise; and said second bandpass filter is supplied with a signal produced by subtracting said first control signal from said error signal, and extracts said second control signal from the supplied signal.