The open-baffle loudspeaker is, although structurally very simple, a challenge for modeling. This paper presents a computationally efficient model for predicting the frequency response and the polar pattern of an open-baffle loudspeaker. The baffle is modeled using time-domain geometrical theory of diffraction, and the conventional driver model is complemented with simple additions to approximate the acoustical asymmetry of the structure.
https://www.aes.org/e-lib/browse.cfm?elib=8155
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