Publication:
Development of a compact apparatus for determining complex parameters of fluid-filled porous solids by impedance techniques.

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Authors
Grant, Steven D.
Subjects
Bulk Modulus
Acoustic Impedance
Acoustic Coupler
Complex Mass Density
Fluid Saturated
Advisors
Baker, Steven R.
Wilson, O.B.
Date of Issue
1988
Date
September 1988
Publisher
Language
en_US
Abstract
A method for determining the complex bulk modulus ᷉B and the complex mass density ᷉p of a fluid contained in a rigid porous solid is investigated. The fluid filled solid is contained within a small cylindrical cavity capped on each end by identical transducers. This method, suitable for an acoustically "soft" transducer, is based upon electroacoustic network theory. ᷉B and ᷉p are obtained from the input electrical impedance of each transducer when they are wired in parallel "in-phase" and "out-of-phase", respectively. A description of the apparatus and preliminary experimental results are presented.
Type
Thesis
Description
Series/Report No
Department
Engineering Acoustics Academic Committee; Antisubmarine Warfare Academic Group
Organization
Identifiers
NPS Report Number
Sponsors
Funder
Format
65 p.
Citation
Distribution Statement
Approved for public release; distribution is unlimited.
Rights
This publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
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