Narrow-frequency band acoustic transducer

Details Narrow-frequency band acoustic transducer Narrow-frequency band acoustic transducer

1982-04-19

1983-11-08

Rubinson, G. Z.

179121R, 179138, 179139, 179181R, H04R 1700

Patent

active

044144369

ABSTRACT:
A narrow-frequency band, acoustic transducer of high conversion efficiency over a narrow-frequency band, which transducer comprises: a truncated diaphragm having a depressed, circular area and a peripheral edge about the circular area and a convex cap section extending outwardly from the circular area; a vibration board adhesively secured about the peripheral edge of the diaphragm, to couple acoustically the vibration board to the diaphragm on one side; and a piezoelectric element centrally secured to the other side of the vibration board, with electrical leads to the piezoelectric element, whereby electrical energy input to the piezoelectric element provides a high decibel acoustical output about the natural resonance frequency of the vibration board.

REFERENCES:
patent: 3230319 (1966-01-01), Kliewer
patent: 3786202 (1974-01-01), Schafft
patent: 4190784 (1980-02-01), Massa

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