Abstract
In three-dimension acoustic field, it is difficult to control the whole room using active noise control (ANC) technique. Instead, around-head-control is investigated in this paper. To realize around-head-control, it is necessary for a controller to follow the head movement. However, there is a problem that the control effect under the movement is worse, and the recovery of control effect after movement is slow in conventional ANC. Against this problem, we propose the new method of improving the adaptation speed. In the algorithm, the updating width appropriate to each coefficient of the adaptive filter is calculated by using a step size vector. The step size vector is calculated from the coefficient of adaptive filter before updating. The validity of the proposal method is shown by the numerical simulation and the experiment in anechoic chamber.
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