Axisymmetric Condenser Microphone with Electrical Lumping

Application ID: 10731

This model is that of a simple axisymmetric condenser microphone. The model includes all the relevant physics and determines the sensitivity of the specific microphone geometry and material parameters. The model uses a lumped approximation for the electric small signal problem but solves a full FE model for the acoustic-mechanical system. The quiescent (zero point) problem is solved fully using electrostatics and a membrane model.

The model includes:

  1. Thermoacoustics for the acoustics at this small scale
  2. A PDE model of a tensioned membrane
  3. Moving mesh to deform the geometry
  4. Electrostatics to determine capacitance
  5. Circuit model to model electric lumped model (small signal analysis)

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

Acoustics Module