| 摘要 |
PROBLEM TO BE SOLVED: To provide an acoustic device the device scale of which for a predetermined directivity performance is smaller than that of prior art, more specifically, to provide an acoustic device of higher directivity performance if the device scale is the same as that of an acoustic device of prior art, and to provide an acoustic device of smaller device scale if the directivity performance is the same as that of an acoustic device of prior art.SOLUTION: A sound pick-up device includes a plurality of microphones (acoustic converter 111), a reflection structure 190 having a structure made of a material capable of reflecting sound and forming a three-dimensional space with an opening where a plurality of microphones are arranged excepting the opening, and a diffusion structure 180 made of a material capable of reflecting sound and arranged in the three-dimensional space. |
