| 摘要 |
PROBLEM TO BE SOLVED: To provide a microphone unit capable of electrically converting a direction of a main axis of unidirectivity without moving a directivity center.SOLUTION: In a unidirectional microphone unit, microphone elements 11, 12, and 13 are disposed in an isosceles right triangle shape, in which a distance d between the microphone element 11 and the microphone element 12 and a distance d between the microphone element 11 and the microphone element 13 are equal to each other, and a microphone element part 10 is provided, which is constructed so that a directivity center is maintained on the microphone element 11 when an angleψof a direction of a main axis of unidirectivity is changed. |
