DUAL BASE AND ELECTRET CONDENSER MICROPHONE USING THE SAME

摘要

A dual base and an electret condenser microphone using the same are provided to prevent the bending of a PCB or deformation of parts due to stress during a curling process by enabling a metal ring to widely support the PCB. In a dual base of a microphone(100), a metal ring has a pincushion shape with a concave center portion and both protrusive end portions. An insulating ring(164) forms an insulation space between a case(110) and the metal ring by surrounding the concave portion of the metal ring and protruding more than both end portions of the metal ring.