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KTH, School of Engineering Sciences (SCI), Aeronautical and Vehicle Engineering, Marcus Wallenberg Laboratory MWL.ORCID iD: 0000-0002-9031-3662
2009 (English)In: Journal of Computational Acoustics, ISSN 0218-396X, Vol. 17, no 2, 135-157 p.Article in journal (Refereed) Published
Abstract [en]

In this work, a new set of uniform radiation boundary conditions for a half-space model are derived and applied to a fundamental problem in outdoor sound propagation. This original approach derived here relies upon a high-order family of local radiation boundary conditions related to plane wave reflection coefficients. Validity of the approximation is carried out by examining sound propagation above an impedance ground using a spectral finite element method. This is followed by computational results verified against an analytic solution for sound propagation over hard ground. Finally, the case of sound propagation above a grass-strip surrounded by rigid ground and a rigid-strip in a grassland environment with atmospheric profiles are studied.

Place, publisher, year, edition, pages
2009. Vol. 17, no 2, 135-157 p.
Keyword [en]
Nonreflecting, boundary conditions, sound propagation, finite element, method, absorbing boundary-conditions, wave-equation
National Category
Fluid Mechanics and Acoustics
URN: urn:nbn:se:kth:diva-18508ISI: 000266912900002ScopusID: 2-s2.0-67650488630OAI: diva2:336555

QC 20100525

Available from: 2010-08-05 Created: 2010-08-05 Last updated: 2016-05-11Bibliographically approved

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