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Flat-panel loudspeaker exciters are moving coil motors with a coupling surface, often shaped like a ring or disc, that attaches to the surface of a plate. Simulations normally treat the exciter as acting like a point force, but in reality, the ring or disc shape can have a significant influence on the frequency response of the plate at middle and high frequencies. Equations to model the effects of disc and ring shapes are introduced, and simulations demonstrate that these exciter coupling shapes impose a low-pass filtering effect with sharp nodes in the frequency response of the vibrating surface, with rings having a lower cutoff frequency than discs. Comparisons between simulation and experimental data are provided.
Author (s): Anderson, David A.
Affiliation:
Department of Electrical Engineering, University of Minnesota Duluth, Duluth, MN, USA
(See document for exact affiliation information.)
Publication Date:
2025-01-07
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Anderson, David A.; 2025; Disc and Ring Exciter Shape Effects on Flat-Panel Loudspeakers [PDF]; Department of Electrical Engineering, University of Minnesota Duluth, Duluth, MN, USA; Paper ; Available from: https://aes2.org/publications/elibrary-page/?id=22795
Anderson, David A.; Disc and Ring Exciter Shape Effects on Flat-Panel Loudspeakers [PDF]; Department of Electrical Engineering, University of Minnesota Duluth, Duluth, MN, USA; Paper ; 2025 Available: https://aes2.org/publications/elibrary-page/?id=22795