Thomas Eugene Whitmore

US Patent:

47001003, Oct 13, 1987

Filed:

Sep 2, 1986

Appl. No.:

6/903018

Inventors:

John C. Congdon - Fort Wayne IN
Thomas A. Whitmore - Fort Wayne IN

Assignee:

Magnavox Government and Industrial Electronics Company - Fort Wayne IN

International Classification:

H01L 4108

US Classification:

310332

Abstract:

Omnidirectional sonic transducers suitable for underwater operation as either hydrophones (listening devices) or projectors (sonic sources) are disclosed. The transducing device has a hollow resonant cavity with at least one flexural disk mounted therein in acoustic communication with both the interior and exterior of the cavity. The cavity also has at least one aperture providing acoustic coupling between the cavity interior and exterior, and a pliant lining covering substantially the entire cavity inner surface except for flexural disk surfaces and the aperture to detune the natural cavity resonance by reducing the rigidity of the cavity inner surface, thereby improving the overall frequency response characteristics of the transducing device.