Dynamic microphone

Details Dynamic microphone Dynamic microphone

1990-12-21

1993-10-19

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Having electrostatic element

381177, 381203, 29594, H04R 2500

Patent

active

052553280

ABSTRACT:
The invention relates to a supporting structure of a diaphragm of a dynamic microphone. A viscous liquid is filled in the inside of the peripheral edge portion of the edge portion of the diaphragm, thereby supporting the diaphragm to the casing through the viscous liquid. On the other hand, the peripheral edge portion of the diaphragm is fixed to the casing by a fixed ring and the viscous liquid is filled between the fixed ring and the front and rear surfaces of the peripheral edge portion of the edge portion of the diaphragm. With the above structure, by supporting the diaphragm to the casing through the viscous liquid, the liquid also moves in accordance with the vibration of the diaphragm without blocking the vibration of the diaphragm. Therefore, it is possible to certainly prevent the occurrence of the resonance at a special frequency.

REFERENCES:
patent: 3573396 (1971-04-01), Schoengold
patent: 4235302 (1980-11-01), Tsukamoto
patent: 4384174 (1983-05-01), Suzuki et al.
patent: 4596903 (1986-06-01), Yoshizawa
patent: 4654554 (1987-03-01), Kishi

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