A Model of the Acoustic Interactions Occurring Under Arctic Ice

Abstract

Underwater sound interacting with the Arctic ice cover is reflected from the plane surface as well as scattered due to small-scale roughness elements and large pressure-ridge keel structures. Experiments modeled the acoustic ice interactions using burst transmissions from omnidirectional underwater point sources. Floating acrylic plates were employed to represent the Arctic ice due to similarity in impedance characteristics and other physical properties to known ice values. Geometrical properties of the ice were accurately scaled in the acrylic by maintaining the appropriate wavelength ratios. Reflection and forward scatter effects were analyzed and compared with existing theories for the Arctic.

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Document Details

Document Type
Technical Report
Publication Date
May 22, 1990
Accession Number
ADA227128

Entities

People

  • Roger R. Ullman Ii

Organizations

  • United States Naval Academy

Tags

Communities of Interest

  • Air Platforms
  • C4I
  • Energy and Power Technologies
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Impedance
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Waves
  • Acoustics
  • Climate Change
  • Databases
  • Glaciers
  • Oceans
  • Physical Properties
  • Plastic Explosives
  • Reflection
  • Sea Ice
  • Sea Water
  • Shear Modulus
  • United States Naval Academy
  • Wave Propagation

Readers

  • Electromagnetic Wave Scattering and Antenna Radiation Engineering
  • Polar and Arctic Studies