Patent ID: 8411881

Claim:
An electret capacitor microphone with one-piece vocal cavity component comprising: a shell ( 110 ) having cavity and a tune hole ( 111 ) being on a top surface of the shell, a vibration element ( 120 ) located in the shell, a circuit board ( 150 ) used to connect with the shell; a first vocal cavity is formed between said vibration element ( 120 ) and inner top surface ( 112 ) of the shell ( 110 ); said voice hole ( 111 ) is through to the first vocal cavity; an one-piece vocal cavity component ( 140 ) made of conducting materials located between the vibration element ( 120 ) and the circuit board ( 150 ) comprising a ring-like side wall ( 145 ) and a cavity board integrated with the side wall, there is a through hole ( 141 ) on the cavity board which is sunken in the side wall, the side wall ( 145 ), cavity board and vibration element define a second vocal cavity; outside of the side wall ( 145 ) is coated by insulation-material layer.