Symmetric double phonic diaphragm volume-enhancing device

Details Symmetric double phonic diaphragm volume-enhancing device Symmetric double phonic diaphragm volume-enhancing device

1988-04-22

1989-03-14

Fuller, B. R.

Acoustics

Diaphragm

With resonant chamber

181144, 181157, 181159, 381 82, 381156, 381159, 381186, 381190, 310322, G10K 912

Patent

active

048118168

ABSTRACT:
A device having two sets of oppositely facing corresponding resonance cavities; i.e., an upper and a lower resonance cavity. Each of the resonance cavities include a piezo-electric type diaphragm consisting of a vibration diaphragm and a start-up plate. Electric signals cause the piezo-electric type diaphragm to vibrate back and forth and produce sound waves from the upper and lower resonance cavity.

REFERENCES:
patent: 3025359 (1962-03-01), Schilling et al.
patent: 3028927 (1962-04-01), Levy et al.
patent: 4190784 (1980-02-01), Massa
patent: 4330729 (1982-05-01), Byome
patent: 4689609 (1987-08-01), Ko et al.

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