Horn AcousticsZIP
Calculation through the cutoff frequency [b&w engineer]

Analysis of a Folded Hornpdf
Andrew Bright 1 2
1 Nokia Group, FIN-00045, Helsinki, Finland
2 Section of Acoustic Technology, Ørsted•DTU, Technical University of Denmark, Lyngby, Denmark
ABSTRACT
A boundary element model is used to analyse a folded horn. Results from the boundary element model are
compared to measurements of the throat radiation impedance and the far-field acoustic response. Further analysis
shows how one-dimensional and lumped parameter models can be derived from the boundary element results, and
used to gain insight into the behaviour of the folded horn loudspeaker system. It is shown that one type of folded
horn behaves more like a vented-box than a traditional horn-loaded loudspeaker system.

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