| 摘要 |
PURPOSE:To simply obtain higher sound effect inexpensively at video recording by arranging a single directivity microphone unit (one set) and asymmetrical dual directivity microphone units (two sets) in a specific spatial arrangement. CONSTITUTION:A unit 1 has a unidirectional directivity and is arranged on a microphone major axis in front direction. Units 2, 3 are asymmetrical dual directivity units having nearly same sensitivity and directivity and placed at a rear distance D from the unit 1. Moreover, the unit axis has a deviation angle delta with respect to the main axis and the directivity is selected the same as that of the unit 1. A position P1 is selected for a single directivity microphone, a position P2 is selected for a super directivity microphone and a position P3 is used for a stereophonic microphone in a changeover switch 6 and the 3 kinds of the directivity is selected properly by a changeover switch. |
