Acoustic apparatus

Details Acoustic apparatus Acoustic apparatus

1989-03-24

1991-04-23

Fuller, Benjamin R.

Acoustics

Diaphragm

With resonant chamber

181153, 181156, 381 93, 381 96, 381159, H04R 128, H04R 304

Patent

active

050092804

ABSTRACT:
An acoustic apparatus for improved bass sound reproduction comprising a resonator, a vibrator, and a vibrator drive means, the resnoator having a passive diaphragm serving as a resonance radiation unit for radiating an acoustic wave by resonance, the vibrator having an active diaphragm provided for the resonator, and the vibrator drive means having a drive control means for controlling a drive condition so as to cancel atmospheric counteraction of said resonator at the time of 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: 3821423 (1974-06-01), Mullins
patent: 3984635 (1976-10-01), Nestorovic et al.
patent: 4092494 (1978-05-01), Micheron
patent: 4180706 (1979-12-01), Bakgaard
patent: 4549631 (1985-10-01), Base

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