The Fast Field Program (FFP) and Attenuation Loss in Hudson Bay

Abstract

The Fast Field Program (FFP) was developed to provide rapid, accurate, propagation-loss predictions for a generalized environmental model. This report demonstrates the utility of the FFP, in a different capacity, as a research tool to investigate the sound attenuation in a water column. Hudson Bay was selected as the area of application because the results of propagation experiments conducted there during August 1970 were available and interesting. The experimentally determined values of the attenuation coefficient for the frequency band 315 to 1600 Hz were found to exceed the values that would be predicted from existing formulas based on empirical relationships. The possibility that this anomalous behavior could have been due to energy leakage into the bottom is examined, and the values of the attenuation coefficient determined from the FFP analysis are compared with experimental results.

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Document Details

Document Type
Technical Report
Publication Date
Apr 19, 1972
Accession Number
AD0743065

Entities

People

  • Frederick R. Dinapoli
  • Mary R. Powers

Organizations

  • Naval Underwater Systems Center

Tags

Communities of Interest

  • Energy and Power Technologies
  • Materials and Manufacturing Processes
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Propagation
  • Acoustic Waves
  • Algorithms
  • Bottom Loss
  • Experimental Data
  • Fluids
  • Frequency
  • Frequency Bands
  • Hudson Bay
  • Losses
  • Plastic Explosives
  • Regression Analysis
  • Sea Water
  • Thickness
  • Transmission Loss
  • Water
  • Waves

Readers

  • Acoustical Oceanography.
  • Calculus or Mathematical Analysis