Summary Technical Report of Division 6, NDRC. Volume 17. Underwater Sound Equipment 4. Frequency-Modulated Sonar Systems

Abstract

Frequency-modulated sonar systems are discussed as to their application as underwater sound equipment. The subject is presented under the following topics: introduction to FM systems, frequency-modulated echo ranging, exploratory developmental systems, present FM (QLA-1), transducer development, developmental systems, associated devices and development. The basic job of a sonar system is the detection of submerged objects which are undetectable by any other method. In addition to mere detection the system should measure range, bearing, range rate, target aspect, depth, etc. The use of FM enables more than one target to be assimilated at a time, and two targets or more on a line but at different ranges may also be assimilated simultaneously. By use of FM the time element is reduced to 1/4th that of other known systems.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1946
Accession Number
AD0221593

Tags

Communities of Interest

  • Energy and Power Technologies
  • Ground and Sea Platforms
  • Weapons Technologies

DTIC Thesaurus Topics

  • Acoustic Equipment
  • Acoustics
  • Chemical Synthesis
  • Chemistry
  • Detectors
  • Doppler Effect
  • Echo Ranging
  • Materials Science
  • Naval Operations
  • Navy
  • Piezoelectric Crystals
  • Range Finding
  • Repetition Rate
  • Sonar Equipment
  • Test And Evaluation
  • Transducers
  • Underwater Sound Equipment

Fields of Study

  • Engineering

Readers

  • Radar Systems Engineering.
  • Systems Analysis and Design
  • Technical Research and Report Writing.