Accession Number : AD0651540

Title :   MONOSTATIC ACOUSTIC SCATTERING FROM THE OCEAN VOLUME,

Corporate Author : NAVAL RESEARCH LAB WASHINGTON D C

Personal Author(s) : Hurdle,Burton G. ; Flowers,Kenneth D.

Report Date : 28 MAR 1967

Pagination or Media Count : 21

Abstract : 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)

Descriptors :   (*UNDERWATER SOUND, SCATTERING), SEA WATER, ACOUSTIC PROPERTIES, ATLANTIC OCEAN, SHALLOW WATER, DEEP WATER, INTENSITY, ELECTROACOUSTIC TRANSDUCERS, MATHEMATICAL MODELS

Subject Categories : Acoustic Detection and Detectors
      Acoustics

Distribution Statement : APPROVED FOR PUBLIC RELEASE