Patent ID: 8036396
Filing Date: 2011-10-11
Classification: G10K

Abstract:
1. A vehicular active vibratory noise control apparatus comprising: a first standard signal generator for generating a first standard signal relative to a road noise on a vehicle; a first adaptive filter for outputting a first control signal based on said first standard signal; a canceling sound output unit for outputting a canceling sound to cancel said road noise based on said first control signal; an error signal detector for detecting a residual noise due to an interference between said canceling sound and said road noise at an evaluating point, as an error signal; a first filter coefficient updater for sequentially updating a first filter coefficient of said first adaptive filter; a rotational frequency detector for detecting a rotational frequency of a rotating component mounted on the vehicle; a second standard signal generator for generating a second standard signal relative to said rotating component based on the detected rotational frequency; a second adaptive filter for outputting a second control signal based on said second standard signal; a second filter coefficient updater for sequentially updating a second filter coefficient of said second adaptive filter; and a subtractor for generating a corrected error signal by subtracting said second control signal from said error signal, wherein said first filter coefficient updater updates said first filter coefficient based on said corrected error signal and said first standard signal.