The theory of geometric optical diffraction has been used to investigate the effects of sound diffraction at the edge of a loudspeaker cabinet. The asymptotic assumption of the optical theory is examined by the use of the finite-element method. Comparisons are made between the two different methods, indicating the accuracy of the optical method for perpendicular incidence of the sound wave. Experimental evidence indicates that the optical method is not correct for nonperpendicular incidence. An improved formulation of the optical method is proposed which yields results more consistent with experiments with accepted theoretical approaches.

Authors: Porter, James; Geddes, Earl
Affiliations: Department of Physics and Astronomy, Eastern Michigan University, Ypsilanti, MI ; Electrical and Electronics Division, Ford Motor Company, Dearborn, MI(See document for exact affiliation information.)
JAES Volume 37 Issue 11 pp. 908-918; November 1989
Publication Date: November 1, 1989 Import into BibTeX
Permalink: https://www.aes.org/e-lib/browse.cfm?elib=6062

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