The Curtain Effect in a Shallow Water Environment

Abstract

The curtain effect that controls sound propagation in a sound channel (Browning, et al., J. Acoust. Soc. Am. Suppl. 1 88, S132 (1990)) is shown to exist in modified form for severely bottom-limited propagation conditions that can exist in shallow water during the summer. The initially dominant loss component, whose rate decreases with range, is now angular-dependent multiple bottom bounce propagation loss. The range-independent component is an effective attenuation that includes low-angle bottom loss. The transition between these components is equivalent to the crossover of the components in the sound channel case. An effective range can be obtained by extending the effective attenuation component back to the intersection with the rate of spreading loss component. Illustrations are given for several shallow water areas.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 03, 1992
Accession Number
ADA247578

Entities

People

  • D. G. Browning
  • J. M. Monti
  • P. D. Herstein
  • R. J. Christian

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Attenuation
  • Bottom Bounce
  • Bottom Loss
  • Boundaries
  • Deep Water
  • Environment
  • Frequency
  • Geometry
  • Grazing Angles
  • High Angles
  • Losses
  • Low Angles
  • Shallow Water
  • Transmission Loss
  • Undersea Warfare
  • Water

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Fluid Dynamics.