ACTIVE NOISE CONTROL DEVICE

PROBLEM TO BE SOLVED: To provide an active noise control device permitting effective and steep muffling even when plural sound pressure peaks are scattered in a noise band. SOLUTION: This active noise control device is provided with a band-pass filter group 5a which performs band-limiting of a noise signal detected by a noise detector 1a in different bands and outputs the signals as noise signals; a band-pass filter group 5b which performs noise-limiting of a noise detected by an error detector 1b in the same bands as those of the band-pass filter group 5a and outputs the signals as error signals; plural adaptive filters 2 for filter- processing based on coefficients to which noise signals are set from the band- pass filter group 5a; plural adaptive algorithms 3 which updates the coefficients of corresponding adaptive filters 2 so as to minimize the error signal; and an adder 7 which sums the outputs of the plural adaptive filters 2 and outputs the sum to a sound wave reproduction unit 4.