Investigation of Calibration Discrepancies of Tile-Type Hydrophone.

Abstract

Wide discrepancies were noted between the acoustic calibrations made at Dodge Pond of an experimental USL tile-type hydrophone and those made by an outside vendor. This memorandum describes the results of initial studies undertaken to determine the reasons for these discrepancies. The measurements made on the array clearly show the sensitivity to be dependent on some unidentified factor, as perhaps water temperature, pressure, or microbubbles. Tests are scheduled at the Underwater Sound Reference Division of NRL, where the effects of water temperature and pressure will be investigated further. Further tests at Dodge Pond will examine possible effects of bubble adherence.

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Document Details

Document Type
Technical Report
Publication Date
Apr 23, 1968
Accession Number
ADA073676

Entities

People

  • Robert O. Kindl

Organizations

  • Navy Underwater Sound Laboratory

Tags

DTIC Thesaurus Topics

  • Adhesion
  • Amplifiers
  • Calibration
  • Detectors
  • Dynamics
  • Frequency
  • Hydrophones
  • Low Noise
  • Measurement
  • New York
  • Photographs
  • Research Facilities
  • Sensitivity
  • Underwater Sound

Fields of Study

  • Physics

Readers

  • Acoustical Oceanography.
  • Aerospace Test and Evaluation
  • Fluid Dynamics.