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**Harvard**

Forssén, J. (2002) *Calculation of noise barrier performance using the substitute-sources method for a three-dimensional turbulent atmosphere*.

** BibTeX **

@article{

Forssén2002,

author={Forssén, Jens},

title={Calculation of noise barrier performance using the substitute-sources method for a three-dimensional turbulent atmosphere},

journal={Acta Acustica united with Acustica},

issn={1610-1928},

volume={88},

issue={2},

pages={181-189},

abstract={Substitute sources between a noise barrier and a receiver are used to calculate the effect of atmospheric turbulence on barrier sound reduction. The method is extended for application to three-dimensional situations with both high and low barriers. Calculations are made for a thin, hard screen, without the influence of a ground surface. The Kirchhoff approximation is applied for the low screens and a more accurate diffraction model is used for the higher screens. The calculated results are compared with corresponding ones for two-dimensional situations, by using the substitute-sources method (SSM) also. The two and three-dimensional calculations give very similar results, which indicates that, for a large variety of situations, only two-dimensional models are needed. The results are also compared with those obtained using a scattering cross-section method which, although it predicts a much weaker influence of turbulence than the SSM, shows mostly the same trend, namely that the turbulence influence is large only within a range of lower screen heights.
},

year={2002},

}

** RefWorks **

RT Journal Article

SR Electronic

ID 23208

A1 Forssén, Jens

T1 Calculation of noise barrier performance using the substitute-sources method for a three-dimensional turbulent atmosphere

YR 2002

JF Acta Acustica united with Acustica

SN 1610-1928

VO 88

IS 2

SP 181

OP 189

AB Substitute sources between a noise barrier and a receiver are used to calculate the effect of atmospheric turbulence on barrier sound reduction. The method is extended for application to three-dimensional situations with both high and low barriers. Calculations are made for a thin, hard screen, without the influence of a ground surface. The Kirchhoff approximation is applied for the low screens and a more accurate diffraction model is used for the higher screens. The calculated results are compared with corresponding ones for two-dimensional situations, by using the substitute-sources method (SSM) also. The two and three-dimensional calculations give very similar results, which indicates that, for a large variety of situations, only two-dimensional models are needed. The results are also compared with those obtained using a scattering cross-section method which, although it predicts a much weaker influence of turbulence than the SSM, shows mostly the same trend, namely that the turbulence influence is large only within a range of lower screen heights.

LA eng

LK http://publications.lib.chalmers.se/records/fulltext/23208/local_23208.pdf

OL 30