An Empirical Prediction Algorithm for Low-Frequency Acoustic Surface Scattering Strengths

Abstract

We propose an algorithm for calculating surface backscattering strength for grazing angles between 0 and 40 deg, for wind speeds between 0 and 40 knots and for frequencies between 50 and 1000 Hz. The algorithm is based on broadband SUS data collected during the Critical Sea Test series of at-sea experiments. It is intended as a replacement for the Chapman-Harris empirical formula presently used in virtually all low-frequency acoustics reverberation models. The algorithm represents an interim step between the original Chapman-Harris formula and a more detailed description of surface scattering that will take into account a wider variety of environmental factors.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Apr 28, 1992
Accession Number
ADA250508

Entities

People

  • Fred T. Erskine
  • Peter M. Ogden

Organizations

  • United States Naval Research Laboratory

Tags

DTIC Thesaurus Topics

  • Acoustic Phenomena
  • Acoustic Scattering
  • Acoustics
  • Algorithms
  • Backscattering
  • Boundaries
  • Frequency
  • Frequency Bands
  • Grazing
  • Grazing Angles
  • Interpolation
  • Perturbation Theory
  • Reverberation
  • Scattering
  • Spreadsheet Software
  • Surface Properties
  • Two Dimensional

Readers

  • Acoustical Oceanography.
  • Computational Modeling and Simulation