ACOUSTIC MICROBUBBLE SPECTRUM ANALYZER CONTINUING EVOLUTION.

Abstract

The spectrum analyzer instrument is intended to analyze insitu microbubble populations by detecting differential ultrasonic velocity and attenuation between a sea water sample and a reference liquid over continuous frequency range from 0.1 to 5.0 MHz. Particular problems addressed included further development of piston type quartz transducer to flatten its frequency response, modification to and repackaging of critical electronic circuits to reduce noise pickup and distortion, and an overall evaluation of the instrument to determine its present performance. While performance does not yet reach the desired goals, it is sufficient for the observation of microbubble phenomena, and indicates important potential for the instrument. Preliminary data are given and appraised in terms of microbubble physics. (Author)

Document Details

Document Type
Technical Report
Publication Date
Jul 01, 1970
Accession Number
AD0709466

Entities

People

  • William R. Turner

Tags

DTIC Thesaurus Topics

  • Analyzers
  • Attenuation
  • Circuits
  • Distortion
  • Electronic Circuits
  • Frequency
  • Frequency Response
  • Liquids
  • Observation
  • Personal Information Managers
  • Sea Water
  • Spectra
  • Spectrum Analyzers
  • Test And Evaluation
  • Transducers

Readers

  • Aerospace Test and Evaluation
  • Fluid Mechanics and Fluid Dynamics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Microelectronics
  • Microelectronics - Microelectromechanical Systems