制御領域の拡大を目指した仮想マイク法を利用する音響パワー制御

抄録

Noise problem can not be ignored for our comfortable everyday life. However Active Noise Control (ANC) can cancel target noise by interference of control sound, the sound reduction area is limited to a narrow range of the vicinity of the control point. When performing ANC, the error microphone must be placed near to the ear. In order to solve these problems, we propose a combination control of a virtual microphone method and multi-channel ANC. In this study, the controller aims to minimize the total acoustic power of the control area. Through the simulation assuming in the anechoic chamber and the experiment, the conventional method and the proposed method was confirmed that almost the same control effect can be obtained. For reducing the calculational cost, pre-identified constant filter is used in the experiment instead of an adaptive filter.