Speaker with motor-controlled internal baffle

Details Speaker with motor-controlled internal baffle Speaker with motor-controlled internal baffle

1993-02-12

1994-04-19

Gellner, Michael L.

Acoustics

Diaphragm and enclosure

Reflex baffle

181199, 381159, H05K 500

Patent

active

053047478

ABSTRACT:
An audio speaker in a cabinet is provided having an internal baffle movable on a track and driven by a motor. The movement of the internal baffle is controlled externally by controls mounted on the speaker cabinet. Selective movement of the internal baffle results in a change of the resonant frequency of the speaker/cabinet combination thereby selectively changing the characteristic of the reproduced sound.

REFERENCES:
patent: 3047090 (1962-07-01), Pruden
patent: 3385394 (1968-05-01), Gundlach
patent: 3923123 (1975-12-01), Latimer-Sayer
patent: 3961684 (1976-06-01), Michael et al.
patent: 5170436 (1992-12-01), Powell

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