Use of Spherical Objects as Calibrated Mine Hunting Sonar Targets

Abstract

Solid, water-filled and air-filled spheres are investigated for suitability as calibrated targets for active mine hunting sonars operating in the range 10kHz to 200kHz. It is found that all solid and water-filled designs have target strengths that are strongly frequency-dependent, but some air-filled designs are not frequency dependent. It is found that thick-walled spherical glass floats are suitable for some frequency ranges, and thin-walled stainless steel spheres are suitable over the whole frequency range, if they are sufficiently well made and conditions allow their deployment.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2002
Accession Number
ADA411950

Entities

People

  • Stuart Anstee

Organizations

  • Defence Science and Technology Group

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustic Properties
  • Acoustics
  • Agreements
  • Australia
  • Backscattering
  • Bandwidth
  • Deployment
  • Detection
  • Frequency
  • Frequency Bands
  • Intensity
  • Measurement
  • Sonar Targets
  • Stainless Steel
  • Systems Science
  • Target Strength
  • Wave Propagation

Fields of Study

  • Engineering

Readers

  • Acoustical Oceanography.
  • Mechanical Engineering/Mechanics of Materials.