| 摘要 |
PROBLEM TO BE SOLVED: To provide a condenser microphone unit that can continuously adjust directivity.SOLUTION: A condenser microphone unit 1 is constituted by housing a diaphragm assembly 20, formed by arranging a diaphragm 22 and a fixed electrode 24 opposite each other with a spacer member 23 interposed, in a unit case 10. The diaphragm assembly 20 has a sound passage formed extending from a rear acoustic terminal hole 27a to a back side of the diaphragm 22, and an acoustic resistance material 26 is disposed at a part of the sound passage. A lock member 33 whose tip portion compresses the acoustic resistance material 26 is disposed in the rear acoustic terminal hole 27a, and the lock member 33 has a lock portion 33b which is knocked down in a reverse hook shape while inserted into the rear acoustic terminal hole from the back side and locked to an inner surface of the acoustic terminal hole to stop the lock member from coming out to the back side. |
