Patent ID: 6928178

Claim:
A condenser microphone comprising: a condenser housing having a bottom wall that is formed with a recess defined by a recess-defining wall which has a base wall portion and a peripheral wall portion extending upwardly from said base wall portion; and a condenser disposed in said condenser housing and including a spacer, a conductive back plate formed with a first electrode and a plurality of through-holes, and a diaphragm formed with a second electrode, spaced apart from said back plate by said spacer, and cooperating with said back plate and said spacer to confine a variable gap chamber thereamong; wherein said condenser covers said recess in such a manner that said back plate confronts said base wall portion and is connected to said peripheral wall portion so as to form a closed air chamber between said base wall portion and said back plate, said air chamber being in fluid communication with said gap chamber through said through-holes.