MONOSTATIC ACOUSTIC SCATTERING FROM THE OCEAN VOLUME

MONOSTATIC ACOUSTIC SCATTERING FROM THE OCEAN VOLUME

A monostatic volume-scattering experiment was conducted in the Atlantic with a piston transducer operated at 19.5 kHz and having a beamwidth of approximately 8 degrees at the half-power points. This investigation was made to determine the correspondence between measured returns and a model based on...

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Bibliographische Detailangaben
Hauptverfasser: Hurdle,Burton G, Flowers,Kenneth D
Format: Report
Sprache:eng
Schlagworte:
Acoustic Detection and Detectors
ACOUSTIC PROPERTIES
Acoustics
ATLANTIC OCEAN
DEEP WATER
ELECTROACOUSTIC TRANSDUCERS
INTENSITY
MATHEMATICAL MODELS
SCATTERING
SEA WATER
SHALLOW WATER
UNDERWATER SOUND
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Beschreibung
Zusammenfassung:A monostatic volume-scattering experiment was conducted in the Atlantic with a piston transducer operated at 19.5 kHz and having a beamwidth of approximately 8 degrees at the half-power points. This investigation was made to determine the correspondence between measured returns and a model based on the theory of isotropic scattering from a volume. Intensities from measured values were averaged and volume-scattering strength computed as a function of depth for several depression angles and for a range of pulse lengths. Scattering strength was found to be independent of the ensonified volume in regions of uniform scattering strength. Scattering strength profiles measured in two areas of the Atlantic display a decrease of scattering strength of approximately three orders of magnitude from near the surface to a depth of 1000 fathoms. (Author)