A Study of Low Frequency Sound Propagation in Shallow Water Ducts

Abstract

This paper presents results from a recent investigation of shallow water propagation loss for low frequencies (500-4000 Hz). Shallow water is defined in this context as a location where acoustic energy has numerous boundary interactions. This definition leads to both physically shallow and not- so-shallow sites. The objectives of this investigation are, first, to gain a quantitative understanding of propagation loss as a function of source/receiver placement and frequency for numerous shallow water environments, in this case, for 10 geographic areas across all four seasons; second, to gain quantitative information of surface duct versus downward refracting propagation by using a statistical approach, and third, to address questions concerning frequencies which are supported in ducting propagation, effects of duct transmission loss in shallow water, and the impact of source/receiver placement in shallow water.

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Document Details

Document Type
Technical Report
Publication Date
Feb 14, 1992
Accession Number
ADA247257

Entities

People

  • David G. Browning
  • Jeffrey H. Sammis
  • Joseph M. Monti
  • Peter D. Herstein

Organizations

  • Naval Undersea Warfare Center

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Abstracts
  • Attenuation
  • Bottom Loss
  • Boundaries
  • Deep Depth
  • Depth
  • Frequency
  • Gain
  • Geographic Regions
  • Geometry
  • Losses
  • Sea Water
  • Shallow Water
  • Southern Hemisphere
  • Thickness
  • Transmission Loss
  • Water

Readers

  • Geotechnical Engineering.
  • Radar Systems Engineering.
  • Theoretical Analysis.