Lumped Loudspeaker Driver Transient Analysis with Nonlinear Large-Signal Parameters
Application ID: 72941
This model shows how to include the nonlinear (large signal) behavior of certain lumped components in a simplified loudspeaker analysis. The mechanical and electrical system is modeled using an equivalent electrical circuit. The large signal compliance CMS(x) and force factor BL(x) are here nonlinear functions of the speaker location. Moreover, the mechanical damping RMS(v) is a function of the speaker velocity. The nonlinear effects associated with the compliance and BL factor are especially important at lower frequencies. This is also where a lumped modeling approach has its main application.
The model uses the built-in coupling between the Interior Lumped Speaker Boundary (or Lumped Speaker Boundary) featured and an Electric Circuit interface, together with built-in variables for the speaker location x and velocity v.
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:
- COMSOL Multiphysics® and
- Acoustics Module and
- either the AC/DC Module, Battery Design Module, MEMS Module, Plasma Module, RF Module, or Semiconductor Module
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.