Bottom Penetration at Shallow Grazing Angles II

Abstract

A study was made of acoustic propagation through sandy sediments. It was done in two parts. First an acoustic model for penetration based on the Biot model was considered. The model was used to predict phase velocities, attenuations, reflection coefficients, and pressure amplitudes in the sediment. Second, a preliminary model for acoustic backscatter from a distribution of gas bubbles was developed. The model involves a combination of existing theories for backscattering strengths from individual bubbles with a hypothetical bubble size distribution function which is related to the sediment rain size distribution.

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Document Details

Document Type
Technical Report
Publication Date
Jun 19, 1992
Accession Number
ADA255700

Entities

People

  • Frank A. Boyle
  • Nicholas P. Chotiros

Organizations

  • University of Texas at Austin

Tags

Communities of Interest

  • Air Platforms
  • Space

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Amplitude
  • Backscattering
  • Bulk Modulus
  • Coefficients
  • Distribution Functions
  • Experimental Data
  • Frequency
  • Grain Size
  • Grazing Angles
  • Measurement
  • Military Research
  • Phase Velocity
  • Pore Pressure
  • Reflection
  • Scattering

Readers

  • Acoustical Oceanography.
  • Atmospheric Remote Sensing.
  • Computational Modeling and Simulation