Time-Evolution Modelling of Seafloor Scatter, Part 1: Theory

Abstract

A time-series model for acoustic seafloor backscattering is described. The method expresses analytically the elementary time-backscattered response of every seafloor surface and every seafloor volume infinitesimal element. For chosen geometric, acoustical and acquisition parameters, they are summed to produce in the time-domain a realization of the reverberated time pressure field received at the source. The approach is based on the Kirchhoff approximation for the seafloor interface backscattering and on the Small Perturbation theory for the seafloor volume. It only accounts for single backscattering mechanisms of the compressional wave with the seafloor. The model is implemented using calculated height fields for the water-sediment interface and the distributed seafloor volume inhomogeneities. The analytical description of the model and its limitations is described in this report.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1997
Accession Number
AD1114245

Entities

People

  • E. Pouliquen
  • N. G. Pace
  • O. Bergem

Organizations

  • SACLANT ASW Research Centre

Tags

Communities of Interest

  • Air Platforms
  • Materials and Manufacturing Processes

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Scattering
  • Acoustic Waves
  • Acoustics
  • Backscattering
  • Coefficients
  • Frequency
  • Geometry
  • Measurement
  • Nato
  • Perturbation Theory
  • Perturbations
  • Reflection
  • Scattering
  • Seabed
  • Sonar
  • Time Domain
  • Wave Propagation
  • Waves

Readers

  • Acoustical Oceanography.
  • Calculus or Mathematical Analysis