Diaphragm for use in electro-acoustic transducer

Details Diaphragm for use in electro-acoustic transducer Diaphragm for use in electro-acoustic transducer

1985-11-12

1987-06-23

Fuller, Benjamin R.

Acoustics

Diaphragm

Critically defined material or coating

428 64, 428341, 428342, 4284763, 4284793, 4284796, G10K 1300

Patent

active

046745920

ABSTRACT:
A diaphragm for use in an electro-acoustic transducer comprises a diaphragm main body only or mainly composed of natural fibers, a layer formed by laminating thereover a polyamide resin and a synthetic resin coating layer further formed to the surface of the laminate layer. The diaphragm is free from pin holes, exhibits satisfactory water proofness and excellent physical properties such as sonic propagation velocity inherent to the natural fibers. It can be fabricated with ease at a good yield and can reduce the fabrication cost.

REFERENCES:
patent: 2006830 (1935-07-01), Howley
patent: 4076098 (1978-02-01), Wood

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