Results 211 to 220 of about 2,160 (243)
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Underwater acoustics and acoustical oceanography
The Journal of the Acoustical Society of America, 2011Though underwater acoustics (UW) and acoustical oceanography (AO) have different goals, their overlap often makes efforts in these areas indistinguishable. In this talk I emphasize their similarities while also discussing their different approaches.
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Underwater acoustic reflectors
The Journal of the Acoustical Society of America, 1980An underwater acoustic reflector and method for making an acoustic underwater reflector is described herein whereby electrodes are immersed in an aqueous electrolyte solution and thereafter connected to a supply of electrical current. The electrodes are selected such that bubbles form on at least one of the electrodes, providing a layer of acoustic ...
Phillipe H. Cluzel +2 more
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Proceedings of the IEEE, 1979
Underwater acoustic imaging systems are useful in providing underwater observation and inspection capabilities whenever optical systems cannot. Underwater acoustic imaging is a part of the larger field of acoustic imaging, and as such, has its own peculiarities and attributes as compared with the rest of the acoustic imaging field.
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Underwater acoustic imaging systems are useful in providing underwater observation and inspection capabilities whenever optical systems cannot. Underwater acoustic imaging is a part of the larger field of acoustic imaging, and as such, has its own peculiarities and attributes as compared with the rest of the acoustic imaging field.
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The Journal of the Acoustical Society of America, 1980
An underwater acoustic absorber and reflector having an impervious rigid al bonded to a rubber tile. When installed on baffle plates of an underwater vehicle the absorber maintains its efficiency under hydraulic pressure.
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An underwater acoustic absorber and reflector having an impervious rigid al bonded to a rubber tile. When installed on baffle plates of an underwater vehicle the absorber maintains its efficiency under hydraulic pressure.
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Offshore Technology Conference, 1970
ABSTRACT In this paper basic considerations in the design of a practical acoustic telemetry system are developed. These considerations are then applied to three representative modulation schemes: pulse position modulation [PPM], frequency modulation [FM] and frequency shift keying [FSK].
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ABSTRACT In this paper basic considerations in the design of a practical acoustic telemetry system are developed. These considerations are then applied to three representative modulation schemes: pulse position modulation [PPM], frequency modulation [FM] and frequency shift keying [FSK].
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IEEE International IEEE International IEEE International Geoscience and Remote Sensing Symposium, 2004. IGARSS '04. Proceedings. 2004, 2004
Underwater gliders are buoyancy-driven devices; they alternately reduce and expand displaced volume to dive and climb through the ocean. Gliders carry wings and control their pitch attitude to effectuate a horizontal speed component through the ocean. They turn by rolling their wings or by use of a rudder.
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Underwater gliders are buoyancy-driven devices; they alternately reduce and expand displaced volume to dive and climb through the ocean. Gliders carry wings and control their pitch attitude to effectuate a horizontal speed component through the ocean. They turn by rolling their wings or by use of a rudder.
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