Loudspeaker Driver — Transient Analysis

Application ID: 47151

In this model, a full transient analysis of a loudspeaker driver is performed, which allow the modeling of nonlinear effects. It extends the linear frequency domain analysis done in the Loudspeaker Driver tutorial model.

The analysis accounts for nonlinear behavior of the soft iron in the magnetic system, geometric nonlinearities in the structures, and nonlinear effects due to the topology change when the voice coil is moving in and out of the magnetic gap. The model uses the moving mesh feature and automatic remeshing to capture the topology changes and the movement of the voice coil.

The output includes the total harmonic distortion (THD) and the dynamic BL curve. The model also describes how to calculate the intermodulation distortion (IMD).

The model requires the Acoustics Module and the AC/DC Module.

This model example illustrates applications of this type that would nominally be built using the following products: