Waveguide Experiments

WAVE PROPAGATION IN BUBBLY FULIDS, THEORY AND EXPERIMENT

The Research Problem: A basic overview of this work.

Long-term Objectives & Near Term Goals

Impedance Tube Facility: A dedicated laboratory facility to investigate the acoustics of bubbly fluids.

Why use a water filled tube to study bubbly fluids? Are there problems with this? The answers are here.
So it is a good idea. There are problems but it will work, as shown here.
Further proof, a standing wave pattern measured in our heavy walled tube.
Preliminary results, the complex reflection coefficient of an air termination measured in our heavy walled tube.
Additrional results, the complex impedance of an air terminated transmission line.

Detailed Results in the form of a Dissertation

Recent Presentations:

136th ASA Meeting: 3aED6. An audible demonstration of low frequency sound propagation in bubbly water.
138th ASA Meeting: 5pPAb5. Measurement of the complex impedance of a bubbly fluid in the vicinity of the bubble resonance frequency.
140th ASA Meeting: 2aBB9. Acoustic scattering from an elastic tube filled with bubbly fluid.

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Last Updated March 13, 2002