Loudspeaker Driver — Frequency-Domain Analysis
Application ID: 1369
This example shows how to model a loudspeaker driver of the dynamic cone type, common for low and medium frequencies. The analysis is carried out in the frequency domain and thus represents the linear behavior of the driver. The model analysis includes the total electric impedance and the on-axis sound pressure level at a nominal driving voltage, as functions of the frequency. The spatial characteristics of the driver are depicted in a directivity plot.
The tutorial model is set up using a combination of the Magnetic Fields interface and the Acoustic-Structure Interaction multiphysics interface.
The first analysis solves only the electromagnetic part of the problem when the driver is at rest. From here, the driving force factor and the blocked voice coil impedance can be extracted and exported for further use.
The final analysis is of the full model, including the relevant multiphysics interactions like acoustic-structure interaction and the electromagnetic force acting on the voice coil.
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:
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.