Refinements of Transmission Line Loudspeaker Models
Simple waveguide models of loudspeaker enclosures describe well enclosures with simple interior geometry, but their accuracy is limited if used with more complex internal structures. A refinement of transmission line loudspeaker model is discussed, presenting one-dimensional waveguide approximations for bends and corners. Bends and corners are represented as area changes in the line, approximated as one-dimensional line segments with parameters adjusted to match the exact solutions for sharp (rectangular) corners in a waveguide. Besides modeling the paper discusses the sound transmission characteristics of commonly used bend types and the applicability of the results to folded horns.
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