Miniature sounder with multi-part tuned cavities

Details Miniature sounder with multi-part tuned cavities Miniature sounder with multi-part tuned cavities

1981-03-10

1983-10-11

Caldwell, Sr., John W.

Communications: electrical

Audible indication

Ultrasonic pest control

181160, 340388, G08B 310

Patent

active

044095880

ABSTRACT:
A miniature sounder having a diaphragm closing one end of a tuned chamber. The other end of the chamber communicates with the interior of a tuned housing through which an open-ended enclosure extends. The oscillating frequency of the diaphragm. The housing and enclosure are tuned to resonate at the desired frequency.

REFERENCES:
patent: 3952159 (1976-04-01), Schott
patent: 3980154 (1976-09-01), Johnson
patent: 4251807 (1981-02-01), Hofer et al.

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