2010 年 76 巻 772 号 p. 3414-3421
This paper deals with active noise control (ANC) using phased array loudspeakers as a control source, the attributes of which are sharp directivity and steering capability of the sound beam. Therefore, even when a targeted control point moves around in the sound field of interest, the phased array loudspeaker may track the target without mechanically rotating the face of the array loud-speakers, thereby achieving pinpoint control of noise without causing spillover phenomenon. The objective of the article is to enhance the steering capability of the sound beam: from two dimensional steering to three dimensional steering using a matrix phased array system presented. To verify the validity of the proposed method, a numerical analysis as well as an experiment is conducted.