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Uniform radiation conditions for a sound propagation model

Peplow, A. T. LU orcid and Finnveden, S. (2009) In Journal of Computational Acoustics 17(2). p.135-157
Abstract

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... (More)

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.

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author
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publishing date
type
Contribution to journal
publication status
published
subject
keywords
Boundary conditions, Finite element method, Nonreflecting, Sound propagation
in
Journal of Computational Acoustics
volume
17
issue
2
pages
23 pages
publisher
World Scientific Publishing
external identifiers
  • scopus:67650488630
ISSN
0218-396X
DOI
10.1142/S0218396X09003896
language
English
LU publication?
no
id
b35edd4b-3fff-4f32-9009-62e6ae6caa73
date added to LUP
2021-02-04 09:56:10
date last changed
2022-02-01 20:00:08
@article{b35edd4b-3fff-4f32-9009-62e6ae6caa73,
  abstract     = {{<p>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.</p>}},
  author       = {{Peplow, A. T. and Finnveden, S.}},
  issn         = {{0218-396X}},
  keywords     = {{Boundary conditions; Finite element method; Nonreflecting; Sound propagation}},
  language     = {{eng}},
  number       = {{2}},
  pages        = {{135--157}},
  publisher    = {{World Scientific Publishing}},
  series       = {{Journal of Computational Acoustics}},
  title        = {{Uniform radiation conditions for a sound propagation model}},
  url          = {{http://dx.doi.org/10.1142/S0218396X09003896}},
  doi          = {{10.1142/S0218396X09003896}},
  volume       = {{17}},
  year         = {{2009}},
}