Calculations of Inhomogeneous Ground Effects in Outdoor Sound Propagation Using the Boundary Element Method (BEM)

Abstract

This report summarizes the results of a study to calculate the effect of inhomogeneous ground impedance on acoustic wave propagation. The boundary element method was used to investigate the effect of snow or bare ground patches along the acoustic propagation path. This method can be used to calculate the effect of inhomogeneities in the propagation medium with a relatively small computational effort compared to many other methods (for example, the finite difference method). The boundary element method is first verified by showing agreement with a published result, and then shown to give good agreement with experimental measurements.

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 2004
Accession Number
ADA430712

Entities

People

  • Donald G. Albert

Organizations

  • Engineer Research and Development Center

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Army
  • Army Corps Of Engineers
  • Attenuation
  • Boundary Element Methods
  • Engineers
  • Equations
  • Frequency
  • Geometry
  • Ground Effect
  • Materials
  • Measurement
  • Reflection
  • Snow Cover
  • Wave Propagation
  • Waves

Fields of Study

  • Physics

Readers

  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Finite Element Method (FEM) for solving Partial Differential Equations (PDEs)
  • Polar and Arctic Studies