Measurement and Analysis of Sound Speed Dispersion During SAX04

Abstract

This project is developing equipment and techniques to measure sound speed dispersion in the 1 to 10 kHz frequency band during the Office of Naval Research SAX04 experiment. Historically, it has been difficult to make these measurements below 10 kHz. As a result, there is a paucity of experimental results with large uncertainties. Measurements in this frequency band are critical as this is where the most pronounced sound speed dispersion is expected and the predictions of various sediment acoustic models differ significantly. The objectives of this project will be achieved by pursuing complementary approaches to making the sound speed dispersion measurements, including: angle of refraction; acoustic impedance; reflection loss; and time of flight. Work completed in FY04 includes: numerical simulations; analysis of the APEX99 NATO data set; implementation of array element localization software; equipment design, procurement, and assembly; calibrations; field testing; and staging for SAX04.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 2004
Accession Number
ADA436417

Entities

People

  • John C. Oster
  • Paul C. Hines

Organizations

  • Defence Research and Development Canada

Tags

Communities of Interest

  • Engineered Resilient Systems
  • Sensors

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustics
  • Acquisition
  • Assembly
  • Calibration
  • Data Sets
  • Frequency
  • Frequency Bands
  • Impedance
  • Measurement
  • Military Research
  • Physical Properties
  • Procurement
  • Reflection
  • Refraction
  • Seabed
  • Simulations

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Polymer Science and Technology
  • Systems Analysis and Design