THE USE OF THE MK 6 ACOUSTIC SYSTEM (AUDIO RECEPTION SYSTEM M-21) FOR SOUND RANGING

Abstract

Ranging experiments were conducted using blasting caps as sound sources and a straight-line array of 4 hydrophones of an Mk 6 acoustic system installation. Modifications of the Mk 6 system included the addition of a filter section to the power supply to reduce the hum level and the substitution of a 125 mm/sec pen recorder and 4 separate amplifier channels for the original audio amplifier and recording system. An integrating device with a time constant of 0. 01 sec was inserted immediately after the attenuators on the shore-based equipment; this circuit provided an envelope of frequencies above 100 cps. The hydrophones were spaced 500 to 1000 yd apart. The tests demonstrated that passive sound ranging is entirely practicable and that precise location of the sound source is possible. Precision was limited by the location of the hydrophone. Triangular arrays were recommended to aid in plotting and to improve accuracy. An electronic time-measuring device based upon digital computing techniques was suggested to provide automatic surveillance.

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Document Details

Document Type
Technical Report
Publication Date
Aug 12, 1952
Accession Number
AD0011451

Entities

People

  • Robert K. Waring

Organizations

  • Yale University

Tags

DTIC Thesaurus Topics

  • Accuracy
  • Amplifiers
  • Audio Amplifiers
  • Base Lines
  • Cables
  • Explosions
  • Frequency Response
  • Hydrophones
  • Junction Boxes
  • Power Supplies
  • Range Finding
  • Recording Systems
  • Security
  • Sound Ranging
  • Surveillance
  • Telephone Lines
  • Underwater Cables

Readers

  • Acoustics.
  • Approximation Theory.
  • Materials Science

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems
  • Space