抄録
In recent years, with the never ending progress in technology related to audio visual equipments and PC, etc., there is an increasing trends of using the reproduction sound of contents such as music and speech even for household purposes. Since all the phenomena occurring in nature need to be considered in relative frame of reference, a pleasant and enjoyable sound to the listener may appear as a noise to the people (non-listener) around the owner of sound player. Therefore, the aim of the present work is to develop a sound field control technology which confined the sound field to the listener only. In this paper, the authors propose a control technology to produce both the listening area the sound pressure is increased and the non-listening area the sound pressure is maintained. Based on the experiment and theoretical estimation the performance of the present technique is verified.
