Diaphragm for speaker

Details Diaphragm for speaker Diaphragm for speaker

1991-03-19

1993-04-27

Gellner, Michael L.

Acoustics

Diaphragm

Critically defined material or coating

181170, G10K 1300

Patent

active

052064662

ABSTRACT:
A speaker diaphragm includes a combined fiber paper made with crushed silk chips and a crushed bast fiber. In the preferred embodiment, the bast fiber is a natural Manila hemp fiber. The silk fiber contributes vibration damping to the diaphragm while the bast fiber contributes strength and stiffness. The crushed silk chips and the crushed bast are mixed with water to produce a slurry from which the water is drained to produce the combined fiber paper. In a further embodiment of the invention, a layer of a different material is disposed between two layers of the combined filter paper. The layer of different material is selected from a hard wound silk gauze, a glass fiber, a polyamid fiber and a carbon fiber.

REFERENCES:
patent: 3935924 (1976-02-01), Nagao et al.
patent: 4377617 (1983-03-01), Ikei et al.

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