This is the third in a series of papers on the details of loudspeaker design using multiphysical computer aided engineering simulation methods. In this paper the simulation methodology for accurately modeling the nonlinear electromagnetics and structural dynamics of a loudspeaker will be presented. Primarily, the calculation of nonlinear force factor Bl(x), nonlinear inductance Le(x), and stiffness Kms(x) in the virtual world will be demonstrated. Finally, results will be presented correlating the simulated model results to the measured physical parameters. From that, the important aspects of the modeling that determine its accuracy will be discussed.
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