HUMAN FACTOR PROBLEMS IN ANTI-SUBMARINE WARFARE. DOPPLER DISCRIMINATION IN RELATION TO ECHO DURATION AND DISPLAY FREQUENCY

Abstract

An experiment was conducted to determine the effects of speed translating recorded sonar signals on accuracy of doppler recognition. Both double-speeding and half-speeding were investigated. In addition, performance differences attributable to differences in basic display frequency were investigated. It was found that doppler recognition was slightly but systematically better when displayed at a central frequency of 500 cps rather than the 800 cps typically used in shipboard systems. Double-speeding the playback of a recorded signal benefited doppler recognition for echo durations from 40 to 100 ms provided the speeded signal was heterodyned back to a desirable display frequency. Half-speeding was found to produce adverse effects on doppler recognition at all echo durations investigated (40 to 220 ms).

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1965
Accession Number
AD0367881

Entities

People

  • Albert Harabedian
  • Raymond A. Gavin

Tags

Communities of Interest

  • Ground and Sea Platforms
  • Human Systems

DTIC Thesaurus Topics

  • Analysis Of Variance
  • Antisubmarine Warfare
  • Contracts
  • Data Analysis
  • Doppler Effect
  • Frequency
  • Frequency Shift
  • Government Procurement
  • Governments
  • National Security
  • Pitch Discrimination
  • Psychology
  • Recognition
  • Scanning Sonar
  • Submarine Warfare
  • Target Classification
  • United States

Fields of Study

  • Engineering
  • Psychology

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Computer Science/Computer Engineering/Data Science/Digital Signal Processing.
  • Radar Systems Engineering.