Flexural plate sound transducer having low resonant frequency

Details Flexural plate sound transducer having low resonant frequency Flexural plate sound transducer having low resonant frequency

1997-05-27

1999-09-21

Lobo, Ian J.

Communications, electrical: acoustic wave systems and devices

Signal transducers

Underwater type

367176, 310326, H04R 1700

Patent

active

059562935

ABSTRACT:
In a preferred embodiment, a flexural plate sound transducer (150), including: a housing (152) having an open central volume (172); a flexural plate (154) attached around an inner surface of the housing (152) and extending across the central volume (172); at least one piezoelectric element (162, 164) attached to a surface of the flexural plate (154); and a mechanical hinge (194) formed in the flexural plate (154) and extending around the flexural plate (154) near an outer periphery thereof, the mechanical hinge (194) being formed such as to cause the flexural plate (154) to move in a substantially piston-like manner when the piezoelectric element (162, 164) is energized.

REFERENCES:
patent: 3321189 (1967-05-01), Scarpa
patent: 3360664 (1967-12-01), Straube
patent: 3497731 (1970-02-01), Straube
patent: 4051455 (1977-09-01), Fowler
patent: 5099461 (1992-03-01), Fitzgerald
patent: 5406531 (1995-04-01), Henriquez et al.

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