扁平単一指向性マイクロホン
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概要
- 論文の詳細を見る
This paper shows that a microphone with oblate unidirectional pattern which is semi-circular directional in horizontal plane and hypercardioid directional in vertical plane, can be obtained by combining two directional microphones via a 90-degree phase difference network. In this paper: deviations from the oblate unidirectional pattern caused by differences in sensitivities, directivities, directions of the principal axes of the two microphones, and the angle of the phase-difference network are discussed. Experimental microphones were constructed from a stereophonic coaxial microphone consisting of two varidirectional capacitor microphones. This oblate unidirectional microphone has the semi-circular directional pattern in horizontal plane, 8o that it can be used effectively for a group discussion in television programs. The microphone is less influenced by the reflections from the table as compared with the ordinary unidirectional microphone, because the microphone has small sensitivity in upward and downward directions.
- 社団法人日本音響学会の論文
- 1971-02-10