Measurement of Complex Sensitivity of Data Channels in Hydrophone Line Array at Very Low Frequency

Abstract

A method is disclosed for acoustic calibration of a towed hydrophone line array. In a very low frequency band, calibration is performed using a surrounding ambient acoustic noise environment observed by one or more calibrated reference standard hydrophones and hydrophone channels of the array being calibrated. The array hydrophone sensitivities are computed by comparing output voltages of the array hydrophones with the output voltages of one or more calibrated reference hydrophones. The method extends the low frequency limit for the calibration of a towed hydrophone line array to substantially less than the minimum frequency at which the acoustic projectors commonly used for acoustic calibrations can transmit a useful acoustic signal.

Open PDF

Document Details

Document Type
Technical Report
Publication Date
Mar 25, 2015
Accession Number
ADA625073

Entities

People

  • Steven E. Crocker

Organizations

  • United States Department of the Navy

Tags

Communities of Interest

  • Sensors

DTIC Thesaurus Topics

  • Acoustic Detectors
  • Acoustic Fields
  • Acoustic Signals
  • Ambient Noise
  • Cross Correlation
  • Digital Data
  • Free Field
  • Frequency
  • Frequency Bands
  • Hydrophones
  • Measurement
  • Patent Applications
  • Standards
  • Statistical Analysis
  • Transducers
  • Transfer Functions
  • Very Low Frequency

Fields of Study

  • Physics

Readers

  • Electrical Engineering
  • Image Processing and Computer Vision.
  • Materials Science and Engineering.