Results of Air Gun Tests (St. Croix): November 1978

Abstract

This technical memorandum presents the results of source level measurements made on a Western Geophysical Walker-type airgun. The objective of these tests was to determine if this type of airgun could meet the requirements for a single element of an active array. The energy source level (ESL) required is 223 dB in the fundamental frequency band. The major result of this test is that the WG air gun appears to provide an ESL of 218 to 219 dB independent of frequency (depth) over the range from 25 to 110 Hz. The fact that the ESLs are independent of depth confirms the contention that the parameters of this gun (when it operates) are independent of depth. If this indeed is the case, then the ESL would not begin to roll off until the fundamental frequency is on the order of the reciprocal of the open port duration. For this gun that would be approximately 150 to 170 Hz.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 1979
Accession Number
ADA072545

Entities

People

  • C. M. Gogos
  • J. E. Barger
  • W. R. Hamblen

Organizations

  • BBN Technologies

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Air Compressors
  • Air Guns
  • Air Supplies
  • Calibration
  • Coefficients
  • Compressors
  • Data Acquisition
  • Energy
  • Frequency
  • Frequency Bands
  • High Pressure
  • Hydrophones
  • Measurement
  • Power Supplies
  • Pressure Transducers
  • Resonant Frequency
  • Transducers

Readers

  • Acoustical Oceanography.
  • Acoustics.
  • Theoretical Analysis.