| 摘要 |
PURPOSE:To make directivity characteristics change widely and narrowly by using a microphone array having sharp directivity characteristics, setting a central layout area, the first side layout area and the second side layout area and combining an output from a microphone unit belonging. CONSTITUTION:The microphone consists of a central layout area ZC composed of a layout of at least three microphone units of the central part, the first side layout area ZS1 composed of a layout of plural microphone units MUb1-MUbm which are set to one side of the central layout area ZC and the second side layout area ZS2 composed of a layout of plural microphone units MUc1-MUcm laid to the other side of the central layout area ZC. In plural microphone units MUa1-MUan, MUb1-Mubm and MUc1-MUcm composing a microphone array MA, prescribed weight is loaded to each sensitivity by respective coefficient devices Ka1-Kan, Kd1-kdn, Kb1-Kbm and Kc1-Kcm which are installed for respective microphone unit. |
