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

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

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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.

Item Type: Journal Article
Copyright Holders: 2009 Acoustical Society of America
ISSN: 0001-4966
Academic Unit/Department: Mathematics, Computing and Technology > Engineering & Innovation
Mathematics, Computing and Technology
Item ID: 19593
Depositing User: Colin Smith
Date Deposited: 26 Jan 2010 11:54
Last Modified: 25 Feb 2016 10:20
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