Communications – electrical: acoustic wave systems and devices – Signal transducers – Underwater type
Patent
1993-11-17
1995-07-25
Lobo, Ian J.
Communications, electrical: acoustic wave systems and devices
Signal transducers
Underwater type
310326, 310337, 367162, H04R 1700
Patent
active
054368740
ABSTRACT:
An apparatus for sensing acoustic signals in a liquid wherein an omnidirectional hydrophone exhibits a hemispheric response pattern. A hydrophone, including a transducer element and a transmitting cable, is mounted such that the transducer element is adjacent the forward face of an acoustic baffle including a layer of sound-absorbing material. The rear face of the acoustic baffle is positioned adjacent an acoustic shield including a layer of sound-reflecting material. The transmitting cable is positioned in an aperture in the acoustic baffle and the acoustic shield, and passes beyond the rear face of the acoustic shield. A flow fairing is positioned adjacent the forward face of the acoustic baffle and encloses at least the forward portion of the transducer element.
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Hodges Frank P.
Kuhn Philip M.
Checkovich Paul
Lobo Ian J.
Martin Marietta Corporation
Young Stephen A.
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