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Multiphysical Simulation Methods for Loudspeakers—Advanced CAE-Based Simulations of Motor Systems

This is the first 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 electromagnetics of loudspeakers will be presented. Primarily, the creation of a useful impedance curve in the virtual world will be demonstrated. The influences of the mechanical mounting will also be illustrated, as well as the inherent non-linearities of the loudspeaker motor. Those non-linearities will be illustrated through the correct simulation of the electromagnetic driving force, which has an influence on all loudspeakers, and the voice coil inductance, which can have a profound influence on midrange and high frequency loudspeakers. Results will be presented, correlating the simulated model results to the measured physical parameters and to the impedance curve. From that, the important aspects of the modeling that determine its accuracy will be discussed.

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AES - Audio Engineering Society