抄録
In 3-dimensional sound field, such as office room, it is difficult to control noise in whole area. Instead of whole area control, near ears active noise control is considered in this paper. It is shown that when an examinee utters during active noise control, the control result becomes worse. To suppress this bad influence of the voice, a reduction method against disturbance caused by utterance is proposed in this paper. An experiment is carried out in anechoic chamber. From the results of the experiment, the effectiveness of the proposed method is shown.
