Horizontal Directionality of Ambient Noise During the CHURCH OPAL Exercise

Abstract

Ambient noise horizontal directionality was measured in the Northeast Pacific Ocean during the CHURCH OPAL exercise of September 1975. Results obtained from the analysis of data acquired by a towed line-array are reported. The results for frequencies dominated by shipping (below 200 Hz) indicate a definite north-south bias in excess of 15 dB at some frequencies. The results are similar to the CHURCH ANCHOR results obtained at the same location 2 years previously, supporting the idea that the pseudo-stationary background noise is repeatable and hence, predictable.

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Document Details

Document Type
Technical Report
Publication Date
Oct 01, 1978
Accession Number
ADC017835

Entities

People

  • R. A. Wagstaff

Tags

Communities of Interest

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

DTIC Thesaurus Topics

  • Acoustic Detectors
  • Acoustic Measurement
  • Aleutian Islands
  • Algorithms
  • Ambient Noise
  • California
  • Data Acquisition
  • Data Analysis
  • Data Processing
  • Data Processing Equipment
  • Databases
  • Information Science
  • Measurement
  • Ocean Currents
  • Pacific Ocean
  • Processing Equipment
  • United States

Readers

  • Acoustics.
  • Oceanography.