Integration of edge-diffraction calculations and geometrical-acoustics modeling

Paul T. Calamia, U. Peter Svensson, Thomas A. Funkhouser

Research output: Chapter in Book/Report/Conference proceedingConference contribution

9 Scopus citations


In time-domain simulations of sound propagation and/or scattering, it is possible to model the geometrical-acoustics (GA) components and the edge-diffraction components separately and combine the results into a "total" impulse response. However, such separate calculations can limit the efficiency and accuracy of the simulations because the two components are not independent. This paper presents an integrated approach for time-domain acoustic modeling in which intermediate values normally utilized only in diffraction calculations are exploited in finding the GA components as well. Specifically, it is shown how to detect the existence of first-order specular reflections and an unobstructed direct-sound path using source and receiver locations specified in edge-aligned cylindrical coordinates. The benefits of the method are described for general modeling cases, as well as for specific source/receiver configurations in which the receiver is located on or near a specular-zone or shadow-zone boundary. Particular attention is paid to the zone-boundary cases, where this method is well suited to ensure continuity of the sound field across the boundary.

Original languageEnglish (US)
Title of host publicationForum Acusticum Budapest 2005
Subtitle of host publication4th European Congress on Acustics
Number of pages6
StatePublished - 2005
Event4th European Congress on Acustics, Forum Acusticum 2005 - Budapest, Hungary
Duration: Aug 29 2005Sep 2 2005

Publication series

NameForum Acusticum Budapest 2005: 4th European Congress on Acustics


Other4th European Congress on Acustics, Forum Acusticum 2005

All Science Journal Classification (ASJC) codes

  • Acoustics and Ultrasonics


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