Speaker device

Details Speaker device Speaker device

1980-05-27

1982-09-28

Hartary, Joseph W.

Acoustics

Diaphragm

Critically defined material or coating

H04R 714

Patent

active

043514111

ABSTRACT:
A speaker device which comprises a diaphragm made of synthetic resin. The diaphragm is formed by injection molding and is plated with metal on both surfaces thereof for enhancing the rigidity against bending. The diaphragm is capable of vibrating as a whole, without making a wavy movement in the axial direction as if the entirety were a rigid matter, with a result of producing a loud and clear sound without any distortion or strain.

REFERENCES:
patent: 3111187 (1963-11-01), Barlow
patent: 3586792 (1971-06-01), Gayford
patent: 4132872 (1979-01-01), Inoue
patent: 4190746 (1980-02-01), Harwood et al.

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