Car Cabin Acoustics using Hybrid FEM-Ray Source Coupling
Application ID: 84301
This tutorial model shows how to model car cabin acoustics using a hybrid FEM-ray approach. The particular example is that of a tweeter located in the dashboard of the car near the windscreen.
A FEM based sub-model of the speaker and its immediate surroundings is used to compute a realistic (near-field) source for the ray propagation. The coupling between FEM and ray tracing is done on a surface using the Release from Pressure Field feature. The method is taking the spatial distribution of power and the intensity vector intro account.
The method is not hybrid in the "classical sense" where the low frequency FEM solution is concatenated to the high frequency ray solution. Here the two methods are combined for a detailed source description.
The model compares to a full FEM simulation using the new shifted Laplacian solver as well as a pure ray tracing model where the source is characterized by its far-field characteristics (using the Release from Exterior Field feature).
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 Tabella delle Funzionalità 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.