Measurement of Attenuation of Low-Frequency Sound (5-8 KC/S) in Small Samples of Sea Water.

Abstract

Cavity resonators with acoustically soft side walls were developed for measuring sound attenuation in sea water. The equipment is capable of such measurement at discrete frequencies between 5 and 8 kc/s, in the range from 10 to 200 db/kyd. Natural sea water with suspended particulate matter and high oxygen content showed attenuations in the whole range, in contrast to either distilled or clean sea water which produced no measurable attenuation. It is suggested that fine invisible bubbles or bubble nuclei may account for the excess attenuation. Theory and experimental results are discussed fully. (Author)

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Document Details

Document Type
Technical Report
Publication Date
Sep 04, 1962
Accession Number
ADA039614

Entities

People

  • P. G. Hansen

Organizations

  • Navy Electronics Laboratory

Tags

Communities of Interest

  • Advanced Electronics
  • Air Platforms
  • Counter WMD
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Acoustic Propagation
  • Acoustic Properties
  • Acoustic Waves
  • Acoustics
  • Birds
  • Cavity Resonators
  • Cells
  • Cellular Structures
  • Measurement
  • Physics Laboratories
  • Sound Waves
  • Standing Waves
  • Tensile Strength
  • Test And Evaluation
  • Two Dimensional
  • Wave Propagation

Fields of Study

  • Physics

Readers

  • Acoustics.
  • Atmospheric Remote Sensing.
  • Marine Ecotoxicology