Bubble Detection Using a Dual Frequency Sound Field

Abstract

The design, testing and analysis of a dual frequency system to detect and determine the resonance frequency (and hence the size) of bubbles ranging from 100 to 7 micro radius is reported. The resonance frequencies were compared to estimates based on the rise time of the bubbles. In general these comparisons agreed to within five percent. Although the system is not ideal for field measurements, it identifies important requirements concerning the size of the sample volume, the frequency and amplitude ranges of the sound fields and signal processing techniques to make an effective system. Bubbles are distinguished from non-gaseous particles by the nature of their nonlinear response to the dual sound field. The system is versatile and can be modified to suit many research purposes. Keyword: Bubble resonance frequency; Nonlinear bubble dynamics; Bubble detection; Bubble size; Dual frequency. Theses.

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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 1988
Accession Number
ADA207286

Entities

People

  • Ernest R. Lineberger Iii

Organizations

  • Naval Postgraduate School

Tags

Communities of Interest

  • Advanced Electronics
  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Acoustics
  • Amplitude
  • California
  • Carrier Frequencies
  • Detection
  • Difference Frequency
  • Electronic Equipment
  • Frequency
  • Measurement
  • Particles
  • Pressure Distribution
  • Resonance
  • Resonant Frequency
  • Signal Generators
  • Signal Processing
  • United States
  • Waveforms

Readers

  • Acoustics.
  • Systems Analysis and Design
  • Underwater engineering and Marine Technology.