Ultrasound wave propagation through rough interfaces: Iterative methods

Arthur P. Berkhoff, J.M. Thijssen, P.M. van den Berg

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    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.
    Original languageUndefined
    Article number10.1121/1.414708
    Pages (from-to)1306-1314
    Number of pages9
    JournalThe Journal of the Acoustical Society of America
    Issue number3
    Publication statusPublished - Mar 1996


    • EWI-12784
    • IR-64775

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