Condenser microphone unit and condenser microphone

摘要

A condenser microphone unit includes a diaphragm; a fixed electrode defining a capacitor together with the diagram; a cylindrical electrode having a first end and a second end, the first end being fitted to the periphery of the fixed electrode; a circuit board in contact with a second end of the cylindrical electrode, the circuit board being electrically connected to the cylindrical electrode; a unit casing accommodating the diaphragm, the fixed electrode, the cylindrical electrode, and the circuit board; and a hollow insulating air chamber provided between the internal peripheral surface of the unit casing and the external peripheral surface of the cylindrical electrode.

主权项

1. A condenser microphone unit comprising:
a diaphragm; a fixed electrode disposed opposite to the diaphragm with a gap therebetween and defining a capacitor together with the diaphragm; a cylindrical electrode having a first end and a second end, the first end being fitted to a periphery of the fixed electrode; a circuit board including electronic components mounted thereon and being in contact with the second end of the cylindrical electrode, the circuit board being electrically connected to the cylindrical electrode; a unit casing accommodating the diaphragm, the fixed electrode, the cylindrical electrode, and the circuit board; and a hollow insulating air chamber provided between an internal peripheral surface of the unit casing and an external peripheral surface of the cylindrical electrode; wherein the cylindrical electrode has a hole that connects an air chamber in a rear of the diaphragm and the hollow insulating air chamber.