Dual, Hyperfast Spectral Decompositions for Sound Propagation on the Continental Shelf: Acoustic Lensing, Imaging, Communication and 'Seeing' Inside Shadow Zones

Abstract

LONG-TERM GOALS: 1. A nonlinear Fourier representation of sound propagation and internal soliton dynamics in the ocean is under development to analyze time series of internal wave data, sound speed profiles and to model sound waves propagating in the oceanic wave guide. The approach may be viewed as a generalization of linear Fourier analysis and is loosely referred to as Nonlinear Fourier Analysis or the Generalized Fourier Transform (GFT). 2. The present report focuses on new results for application of GFT methods to acoustic wave propagation. 3. Application of the method as a tool for searching inside shadow zones and for acoustic communications is also underway.

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Document Details

Document Type
Technical Report
Publication Date
Sep 30, 2006
Accession Number
ADA612394

Entities

People

  • A. R. Osborne

Organizations

  • University of Turin

Tags

Communities of Interest

  • Autonomy
  • Ground and Sea Platforms

DTIC Thesaurus Topics

  • Acoustic Fields
  • Acoustic Propagation
  • Acoustic Signals
  • Acoustic Waves
  • Acoustics
  • Continental Shelves
  • Decomposition
  • Differential Equations
  • Equations
  • Fourier Analysis
  • Fourier Series
  • Internal Waves
  • Numerical Analysis
  • Sound Waves
  • Unmanned Vehicles
  • Wave Equations
  • Waves

Readers

  • Acoustical Oceanography.
  • Adaptive Control and Estimation with Uncertainty in Dynamic Systems.
  • Approximation Theory.