Acoustic apparatus

Details Acoustic apparatus Acoustic apparatus

1989-03-01

1991-04-23

Fuller, Benjamin R.

Acoustics

Diaphragm

With resonant chamber

181153, 181156, 281 96, 281159, H04R 700

Patent

active

050092812

ABSTRACT:
An acoustic apparatus for improved bass sound reproduction comprises a resonator, a vibrator, and a vibrator drive means. The resonator has a resonance radiation unit for radiating an acoustic wave by resonance, the vibrator has a diaphragm disposed in the resonator, the vibrator drive means has a motional feedback (MFB) means for detecting the movement of the diaphragm and negatively feeding back a motional signal corresponding to the movement of the diaphragm to the input side of the circuit, and the counteraction of the resonator on the diagram is canceled upon driving of the resonator whereby the vibrator may be invalidated as viewed from the resonator, and the vibrator and the resonator can be independently designed.

REFERENCES:
patent: 3037081 (1962-05-01), Carlsson
patent: 3812473 (1974-06-01), Mullins
patent: 3984635 (1976-10-01), Nestorovic et al.
patent: 4091494 (1978-05-01), Micheron
patent: 4180706 (1979-12-01), Bakgaard
patent: 4549631 (1985-10-01), Bose
patent: 4741040 (1988-04-01), Kaizer

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