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The Distributed Edge Dipole (DED) Model for Cabinet Diffraction Effects

A simple model is proposed to account for the effects of cabinet edge diffraction on the radiated sound field for direct-radiating loudspeaker components when mounted in an enclosure. The proposed approach is termed the distributed edge dipole (DED) model since it is developed based on the Kirchhoff approximation using distributed dipoles with their axes perpendicular to the baffle edge as the elementary diffractive sources. The DED model is first tested against measurements for a thin circular baffle and then applied to a real-world loudspeaker that has a thick, rectangular baffle. The forward sound pressure level and the entire angular domain are investigated, and predictions of the DED model show good agreement with experimental measurements.

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JAES Volume 52 Issue 10 pp. 1043-1059; October 2004
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AES - Audio Engineering Society