Diaphragm of dynamic microphone

Details Diaphragm of dynamic microphone Diaphragm of dynamic microphone

1991-03-14

1992-09-15

Ng, Jin F.

Electrical audio signal processing systems and devices

Electro-acoustic audio transducer

Microphone capsule only

381193, 381202, 181166, 181170, H04R 2500

Patent

active

051484927

ABSTRACT:
There is a dynamic microphone comprising: a diaphragm which can vibrate by an acoustic wave and a voice coil which is joined to the diaphragm so as to transverse a magnetic field formed by the magnet and can vibrate integratedly with the diaphragm, wherein a number of peripheral treatment agents for damping are coated in a dot shape or a discontinuous stripe shape at intervals onto either one of the front surface and the back surface of the portion of the diaphragm excluding the center dome. With the above construction, a change in stiffness of the diaphragm by the peripheral treatment agents is extremely reduced, it is prevented that the diaphragm resonates at a special frquency, a sudden attenuation of the low frequency limit is prevented, and a low sound can be also certainly collected.

REFERENCES:
patent: 4135601 (1979-01-01), Tsukagoshi et al.
patent: 4140203 (1979-02-01), Niguchi et la.
patent: 4315112 (1982-02-01), Hofer
patent: 4847908 (1989-07-01), Nieuwendijk et al.
patent: 4903308 (1990-02-01), Paddock et al.

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