Plane speaker

Details Plane speaker Plane speaker

1982-09-17

1985-10-01

Brown, Thomas W.

Acoustics

Anatomic or prosthetic relation

Ear and mouth

181173, H04R 702

Patent

active

045448051

ABSTRACT:
A plane speaker comprises a frame having an opening; a diaphragm facing said opening and having secured its peripheral edge portion to the frame; an actuating plate attached perpendicularly to the back of said diaphragm; a coil mounted on the surface of said actuating plate; and magnets attached to the frame opposite to each other in relation to said coil.

REFERENCES:
patent: 1987412 (1935-01-01), Neumann
patent: 3636278 (1972-01-01), Heil
patent: 3699249 (1972-10-01), Crane
patent: 3829623 (1974-08-01), Willis
patent: 4056697 (1977-11-01), Heil
patent: 4276449 (1981-06-01), Sawafuji
patent: 4354066 (1982-10-01), Necoechea

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