Behavior of low-frequency sound waves in porous media
Rossi, Tyler J.
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https://hdl.handle.net/2142/16873
Description
Title
Behavior of low-frequency sound waves in porous media
Author(s)
Rossi, Tyler J.
Issue Date
2010-08-20T18:00:30Z
Director of Research (if dissertation) or Advisor (if thesis)
Swenson, George W.
Department of Study
Electrical & Computer Eng
Discipline
Electrical & Computer Engr
Degree Granting Institution
University of Illinois at Urbana-Champaign
Degree Name
M.S.
Degree Level
Thesis
Keyword(s)
Low-Frequency
sound waves
impedance tube
gravel
glass spheres
tortuosity
porosity
flow resistivity
attenuation coefficient
phase constant
Abstract
This is a study of the relationship between the measured acoustic parameters and the measured physical parameters of porous media. Materials studied include crushed limestone, stream-formed pea gravel, large and small sifted pea gravels, and glass spheres. A standing wave curve fitting algorithm was applied to data taken from a vertical impedance tube to determine the propagation and reflection parameters of the materials. Physical characteristics considered include porosity, tortuosity, and flow resistivity.
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