A note on attenuation and dispersion in marine sediments

Abstract

Propagation loss is a critical factor for sonar performance.Low-frequency sound propagation loss is largely determined by acoustic attenuation in the sea bottom. This memorandum is part of an ongoing project where the objective is to quantify the bottom loss in areas of operational interest, and to provide appropriate methods for acquisition of relevant bottom data. To achieve this objective it is essential to understand how sound interacts with sediments of different characteristics. This memorandum summarizes and discusses theoretical models of physical mechanisms that govern acoustic propagation in marine sediments, in particular the frequency dependence of attenuation ' and sound speed (i.e. dispersion).

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Document Details

Document Type
Technical Report
Publication Date
Apr 01, 1989
Accession Number
AD1114338

Entities

People

  • J. M. Hovem

Organizations

  • SACLANT ASW Research Centre

Tags

DTIC Thesaurus Topics

  • Acoustic Attenuation
  • Acoustic Propagation
  • Acoustic Waves
  • Acoustics
  • Attenuation
  • Defense Planning
  • Dispersions
  • Elastic Waves
  • Flow
  • Fluid Flow
  • Frequency
  • Frequency Bands
  • Geophysics
  • Losses
  • Materials
  • Measurement
  • Seabed
  • Seismic Waves
  • Wave Propagation
  • Waves

Readers

  • Acoustics.
  • Oceanography.
  • Team-Based Human-Centered Cognitive Task Decision Making and Information Performance.