ACTIVE NOISE REDUCTION DEVICE, ACTIVE NOISE REDUCTION SYSTEM USING THE SAME, DEVICE USING THE ACTIVE NOISE REDUCTION SYSTEM AND ACTIVE NOISE REDUCTION METHOD

摘要

PROBLEM TO BE SOLVED: To provide an active noise reduction device satisfying both of stability of an adaptive filter and high convergence speed.;SOLUTION: A control block selects two or more pieces of device information data from a storage on the basis of a piece of device information, and generates the contribution ratio of two or more filter coefficients in a cancel signal on the basis of the two or more pieces of device information data and the device information. An ADF block adjusts the contribution degree of the filter coefficients in the cancel signal on the basis of the generated contribution ratio. Therefore, since the ADF block generates a cancel signal in accordance with the contribution ratio determined by the control block, noises can be reduced even when the device information is changed.;COPYRIGHT: (C)2014,JPO&INPIT