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:
however, additional products may be required to completely define and model it. Furthermore, this example may also be defined and modeled using components from the following product combinations:
The combination of COMSOL® products required to model your application depends on several factors and may include boundary conditions, material properties, physics interfaces, and part libraries. Particular functionality may be common to several products. To determine the right combination of products for your modeling needs, review the Specification Chart and make use of a free evaluation license. The COMSOL Sales and Support teams are available for answering any questions you may have regarding this.