Capacitive electret microphone

• Main Authors: GONG CAIJUAN, WANG FAGANG
• Format: Patent
• Language: Chinese; English
• Published: 22.08.2012
• Subjects: DEAF-AID SETS; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKEACOUSTIC ELECTROMECHANICAL TRANSDUCERS; PUBLIC ADDRESS SYSTEMS

The utility model discloses a capacitive electret microphone. A capacitive component comprises a diaphragm and a back electret condenser which are arranged sequentially and correspond to sound inlet holes of a shell; an electret layer is arranged on one surface of the diaphragm, which faces the back electret condenser; the back electret condenser comprises a cavity which is integrally molded by using the same conductive metal material and of which one end is open; insulating layers are arranged on the outer bottom surface and the outer side surface of the cavity; the cavity comprises a flat plate part with sound holes, a ring body part and a convex part, wherein the ring body part is formed on the edge of one surface of the flat plate part, which faces a circuit board; the ring body part is electrically connected with the circuit board; the convex part is formed on the edge of one surface of the flat plate part, which faces the diaphragm; and the convex part is supported on the edge of the diaphragm. The numb