Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1988-07-08
1989-08-08
Kyle, Deborah L.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
367162, 367166, 310337, H04R 1700
Patent
active
048559644
ABSTRACT:
A piezoelectrically-driven, resonant-pipe projector has formed therein vents to broaden the response of certain cavities resonances and to increase the response between these resonances. The projector exhibits a relatively high electroacoustical efficiency, is capable of medium to high power output over the operating band, and is not depth dependent or depth limited.
REFERENCES:
patent: 4156824 (1979-05-01), Pence
patent: 4524693 (1985-06-01), McMahon et al.
patent: 4706229 (1987-11-01), Congdon
J. B. Lee, "Low-Frequency Resonant-Tube for Underwater Sound" Defence Research Establishment Atlantic, Dartmouth, Nova Scotia, vol. 2, pp. 10-15.
Fanning Bryce L.
McMahon Garfield W.
Eldred J. W.
Her Majesty the Queen in Right of Canada, as represented by the
Kyle Deborah L.
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