Patent ID: 9245518
Filing Date: 2016-01-26
CPC Classification: G10K

Claim Text:
1. An active vibration noise control apparatus comprising: a front road wheel vibration detecting unit configured to detect front road wheel vibrations based on an input applied from a road surface to a front road wheel of a vehicle, and output a front road wheel reference signal representative of the detected front road wheel vibrations; a vehicle speed detecting unit configured to detect a vehicle speed of the vehicle; a delay time calculating unit configured to determine a delay time, which is representative of a difference between respective times when the front road wheel of the vehicle and a rear road wheel of the vehicle pass through a point, based on the vehicle speed; a rear road wheel reference signal outputting unit configured to output a rear road wheel reference signal, which is representative of predicted rear road wheel vibrations, comprising the front road wheel vibrations delayed by the delay time; and a canceling sound outputting unit configured to output a front road wheel noise canceling sound, which cancels out front road wheel vibration noise caused by the front road wheel vibrations at a noise silencing position, based on the front road wheel reference signal, and output a rear road wheel noise canceling sound, which cancels out rear road wheel vibration noise caused by the predicted rear road wheel vibrations at the noise silencing position, based on the rear road wheel reference signal, and a corrective filter configured to reflect a characteristic difference between front road wheel suspensions and rear road wheel suspensions of the vehicle in the rear road wheel reference signal by correcting the rear road wheel reference signal prior to being output by the corrective filter, based on the characteristic difference.