Electrostatic Speaker Driver

Application ID: 106771

This tutorial demonstrates a full electro-vibroacoustic analysis of a conceptual electrostatic speaker driver, composed of thin conducting plastic diaphragm residing between two perforated metal sheets called grids or stators. When an audio signal is applied to the grids (out of phase), an electrostatic force is developed between the charged diaphragm and the grids on both sides. While one grid causes the diaphragm to push, the other causes it to pull, thus moving air and creating sound.

The model couples Solid Mechanics and Electrostatics with the Electromechanical Forces multiphysics coupling feature. Pressure Acoustics, Frequency Domain and Thermoviscous Acoustics, Frequency are used to model sound radiation.

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