Parametric Sonar Study Near-Field Investigation,

Abstract

Results from two parametric nearfield experiments have been reported. The data, known to contain substantial receiving hydrophone intermodulation distortion, have been corrected to deducing the level of the distortion and coherently subtracting the distortion pressure from the measured data. A test of several nearfield theories has been made. Because of the condition of the experimental data, the test is not particularly discriminating. Also, there is not a great deal of spread among the theories considered.

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Document Details

Document Type
Technical Report
Publication Date
Jul 29, 1977
Accession Number
ADA047303

Entities

People

  • James C. Lockwood

Organizations

  • RTX

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Accuracy
  • Amplitude
  • Amplitude Modulation
  • Difference Frequency
  • Distortion
  • Experimental Data
  • Far Field
  • Frequency
  • Hydrophones
  • Intermodulation
  • Measurement
  • Modulators
  • Near Field
  • New York
  • Shape
  • Sound Pressure
  • Test Facilities

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Radar Systems Engineering.
  • Theoretical Analysis.