抄録
A reduction level against higher frequency noise is not sufficient while using ordinary active noise control (ANC) technique in general living space. In order to control broad frequency noise, active noise barrier has been proposed. Both an active and a passive control effect are expected in such active noise barriers. In the ordinary ANC, it is necessary to put a microphone (error microphone) at the point where the noise should be reduced. However, the error microphone often disturbs the movement of the person. Against this problem, virtual error microphone system (VMS) was proposed by Elliott. In the previous studies, we investigated one-channel VMS with active noise barrier, and obtained good results. In this paper, to obtain wider control area, a two-channel VMS with active noise barrier is investigated and its effectiveness is confirmed in the experiments. In the experiments, average control effect in 80cm × 80cm area is measured with various intervals of two control sound sources.
