Perturbation Theory Applied to Sound Scattering from a Rough Sea-Floor

Abstract

Perturbation theory is applied to acoustic scattering from a rough sedimental sea-floor. Realistic boundary conditions are used, i.e. continuity of pressure and the normal component of particle velocity. The scattering strength as a function of grazing and azimuthal angle of incident and scattered energy is derived, depending on acoustic frequency, the two-dimensional roughness spectrum of the sea-floor and the ratios of sound velocity and density of the sediment to water. For the special case of backscattering, theoretical scattering coefficients are compared with measured data from the literature. Under reasonable assumptions on the sea-floor parameters, good agreement between theory and measurement can be achieved.

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Document Details

Document Type
Technical Report
Publication Date
Sep 01, 1992
Accession Number
AD1114959

Entities

People

  • H. H. Essen

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Air Platforms
  • C4I

DTIC Thesaurus Topics

  • Acoustic Frequencies
  • Acoustic Scattering
  • Acoustic Waves
  • Acoustics
  • Backscattering
  • Bottom Loss
  • Deep Water
  • Diffraction
  • Equations Of Motion
  • Forward Scattering
  • Frequency
  • Governments
  • Grazing Angles
  • Losses
  • Measurement
  • Particles
  • Perturbation Theory
  • Reverberation
  • Scattering
  • Seabed
  • Transfer Functions
  • Two Dimensional

Readers

  • Coastal Oceanography
  • Electromagnetic Wave Scattering and Antenna Radiation Engineering