Experimental Applications of the Modular Acoustic System for the Submersible ALVIN

Abstract

The Modular Acoustic System is a broadband general purpose acoustic measurement system designed for use on the submersible ALVIN. This report discusses four general areas for experimental research where the design features of the System, coupled with ALVIN's special capabilities, are particularly appropriate. The areas are: (1) Bottom reflectivity as a function of both frequency and angle of incidence, with particular attention to the porosity created in marine sediments by large populations of marine tube-building organisms, including polychaete worms and pogonophorans; (2) Scattering, as a function of frequency, from fish of the deep scattering layer in those special cases where only one species and one size of fish is present; (3) Measurement of the small-scale topography of the ocean bottom, and relation of that topography to scattering of energy measured as a function of frequency and angle; (4) Near-bottom seismic profiling at 3.5 kHz and higher frequencies.

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Document Details

Document Type
Technical Report
Publication Date
Aug 01, 1975
Accession Number
ADA016612

Entities

People

  • Paul T. Mcelroy

Organizations

  • BBN Technologies

Tags

Communities of Interest

  • Air Platforms
  • Energy and Power Technologies
  • Sensors

DTIC Thesaurus Topics

  • Accuracy
  • Acoustic Measurement
  • Acoustic Properties
  • Acoustics
  • Aquatic Organisms
  • Diffraction
  • Frequency
  • Geography
  • Geometry
  • Measurement
  • Oceanography
  • Ridges
  • Seabed
  • Sonar
  • Statistical Sampling
  • Terrain
  • Topography

Readers

  • Aquatic Ecology
  • Atmospheric Science / Meteorology, specifically Wind Wave Turbulence.
  • Oceanography.