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Predictions of angle dependent tortuosity and elasticity effects on sound propagation in cancellous bone

Aygun, Haydar, Attenborough, Keith, Postema, Michiel, Lauriks, Walter, & Langton, Christian M. (2009) Predictions of angle dependent tortuosity and elasticity effects on sound propagation in cancellous bone. Journal of Acoustical Society of America, 126(6), pp. 3286-3290.

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Abstract

The anisotropic pore structure and elasticity of cancellous bone cause wave speeds and attenuation in cancellous bone to vary with angle. Previously published predictions of the variation in wave speed with angle are reviewed. Predictions that allow tortuosity to be angle dependent but assume isotropic elasticity compare well with available data on wave speeds at large angles but less well for small angles near the normal to the trabeculae. Claims for predictions that only include angle-dependence in elasticity are found to be misleading. Audio-frequency data obtained at audio-frequencies in air-filled bone replicas are used to derive an empirical expression for the angle-and porosity-dependence of tortuosity. Predictions that allow for either angle dependent tortuosity or angle dependent elasticity or both are compared with existing data for all angles and porosities.

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7 citations in Web of Science®

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ID Code: 29648
Item Type: Journal Article
Additional Information: Copyright (2009) Acoustical Society of America. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the acoustical Society of America. The following article appeared in Journal Acoustical Society of America, Volume 126, Issue 6 and may be found at http://scitation.aip.org/getabs/servlet/GetabsServlet?prog=normal&id=JASMAN000126000006003286000001&idtype=cvips&gifs=yes&ref=no
Keywords: acoustic wave absorption, acoustic wave propagation, acoustic wave velocity, bioacoustics, biomechanics, bone, elasticity, porosity
DOI: 10.1121/1.3242358
ISSN: 0001-4966
Subjects: Australian and New Zealand Standard Research Classification > MEDICAL AND HEALTH SCIENCES (110000) > OTHER MEDICAL AND HEALTH SCIENCES (119900) > Medical and Health Sciences not elsewhere classified (119999)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Medical Physics (029903)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > OTHER PHYSICAL SCIENCES (029900) > Biological Physics (029901)
Australian and New Zealand Standard Research Classification > PHYSICAL SCIENCES (020000) > CLASSICAL PHYSICS (020300) > Acoustics and Acoustical Devices; Waves (020301)
Divisions: Past > QUT Faculties & Divisions > Faculty of Science and Technology
Current > Institutes > Institute of Health and Biomedical Innovation
Past > Schools > School of Physical & Chemical Sciences
Copyright Owner: Coopyright 2009 Acoustical Society of America.
Deposited On: 18 Jan 2010 09:05
Last Modified: 01 Mar 2012 00:05

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