| 摘要 |
PROBLEM TO BE SOLVED: To provide a variable directivity microphone which is reduced in size and comprised of a dynamic microphone unit having an excellent directional frequency response.SOLUTION: The present invention relates to a variable directivity microphone 1A, including a pair of a first dynamic microphone unit (front-side unit) 1F of single directivity and a second dynamic microphone unit (rear-side unit) 1R having approximately the same configuration as the front-side unit 1F and a voice signal output-adjusting unit, wherein the front-side unit 1F and the rear-side unit 1R are coaxially disposed while turning their directional axes oppositely at 180° and output signals of the front-side unit 1F and the rear-side unit 1R are outputted through a signal combination circuit. One rear air chamber 1b is shared between the front-side unit 1F and the rear-side unit 1R. |
