Traditional image-source method for room acoustic modeling neglects both diffraction and diffusion. In this study the image-source method is evolved to also include edge diffraction as diffractive image sources. Methods to find diffracting edges from a geometric model of a room, and to visualize diffracted image sources are presented. Issues to limit computational complexity and memory usage in image-source method are reviewed and implemented. Diffractive image sources are visualized for two test cases, and impulse responses are calculated and compared with measured ones.

Authors: Pulkki, Ville; Lokki, Tapio; Savioja, Lauri
Affiliations: Helsinki University of Technology, Laboratory of Acoustics and Audio Signal Processing,HUT, Finland ; Helsinki University of Technology, Telecommunications Software and Multimedia Laboratory,HUT, Finland(See document for exact affiliation information.)
AES Convention: 112 (April 2002) Paper Number: 5603
Publication Date: April 1, 2002 Import into BibTeX
Subject: Room Acoustics and Sound Reinforcement
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=11354

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