ACTIVE NOISE CONTROL SYSTEM

To provide an "active noise control system" capable of satisfactorily canceling noise even when a position of an ear fluctuates.Adaptive operations of a first noise control system (1) and a second noise control system (2) including a speaker that outputs noise cancellation sound, a microphone that detects an error signal, an auxiliary filter that generates, from a noise signal, a correction signal that corrects the error signal so that a difference in a position between the microphone and a noise cancellation position is compensated, and an adaptive filter that performs an adaptive operation using the corrected error signal to generate the noise cancellation sound from the noise signal are alternately performed. A transfer function learned in a state in which the second noise control system (2) is stopped is set in the auxiliary filter of the first noise control system (1), and a transfer function learned in a state in which the adaptive operation of the first noise control system (1) is stopped is set in the auxiliary filter of the second noise control system (2).