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Sound Propagation over Multiple Wedges and Barriers  

Kim, Hyun-Sil (Acoustics Laboratory Korea Institute of Machinery and Materials)
Kim, Jae-Sueng (Acoustics Laboratory Korea Institute of Machinery and Materials)
Kang, Hyun-Ju (Acoustics Laboratory Korea Institute of Machinery and Materials)
Kim, Bong-Ki (Acoustics Laboratory Korea Institute of Machinery and Materials)
Kim, Sang-Ryul (Acoustics Laboratory Korea Institute of Machinery and Materials)
Publication Information
The Journal of the Acoustical Society of Korea / v.23, no.2E, 2004 , pp. 44-50 More about this Journal
Abstract
A theoretical formula that is based on the geometrical theory of diffraction (GTD) is proposed for computing sound diffraction by multiple wedges, barriers, and polygonal-like shapes. The formula can treat both convex and concave edges, where edges mayor may not be inter-connected. Comparisons of theoretical predictions with other results done by the BEM or experiments for scaled model confirm the accuracy of the present formula. Numerical examples such as double wedges and doubly inclined barrier show that when there exist several diffraction paths for given source and receiver positions, the insertion loss is dominated by the diffraction associated with the shortest propagation path.
Keywords
Multiple diffraction; Geometrical theory of diffraction; Barrier; Wedge;
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