Ultrasound wave propagation through rough interfaces: Iterative methods

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Berkhoff, A.P. and Thijssen, J.M. and Berg, P.M. van den (1996) Ultrasound wave propagation through rough interfaces: Iterative methods. Journal of the Acoustical Society of America, 99 (3). pp. 1306-1314. ISSN 0001-4966

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Abstract:Two iterative methods for the calculation of acoustic transmission through a rough interface
between two media are compared. The methods employ a continuous version of the conjugate
gradient technique. One method is based on plane-wave expansions and the other on boundary
integral equations and Green’s functions. A preconditioner is presented which improves the
convergence for spectra that include evanescent modes. The methods are compared with regard to
computational efficiency, rate of convergence, and residual error. The sound field differences are
determined for a focused ultrasound beam distorted by surfaces having a Gaussian roughness
spectrum. The differences are evaluated from the root-mean-square differences on the rough surface
and in the focal plane.
Item Type:Article
Faculty:
Electrical Engineering, Mathematics and Computer Science (EEMCS)
Research Group:
Link to this item:http://purl.utwente.nl/publications/64775
Official URL:http://dx.doi.org/10.1121/1.414708
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