A PORTABLE, GENERAL-PURPOSE UNDERWATER SOUND MEASURING SYSTEM.

Abstract

A portable underwater sound-pressure measuring system was developed and tested. The system was shown to be capable of measuring very low ambient-noise levels. High self-noise levels at frequencies less than 50 to 63 Hz are likely to be present if measurements are made from a drifting ship, and the cable is towed at drift velocity, probably because of a combination of flow noise and noise arising from cable vibrations. These high self-noise levels can be satisfactorily eliminated by using a slack cable system as described in the report. (Author)

Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1967
Accession Number
AD0671191

Entities

People

  • G. M. Wenz
  • M. A. Calderon

Organizations

  • Naval Undersea Warfare Center

Tags

DTIC Thesaurus Topics

  • Acoustic Phenomena
  • Ambient Noise
  • Flow Noise
  • Frequency
  • Frequency Shift
  • Measurement
  • Noise
  • Pressure Measurement
  • Self Noise
  • Sound
  • Sound Pressure
  • Underwater Sound
  • Vibration

Readers

  • Acoustical Oceanography.
  • Aerospace Test and Evaluation
  • Marine Hydrodynamics