Vibroacoustic Loudspeaker Simulation: Multiphysics with BEM-FEM
Application ID: 55881
This model shows a full vibroacoustic analysis of a loudspeaker including driver, cabinet, and stand. It lets you apply a nominal driving voltage and extract the resulting sound pressure level in the cabinet and in the outside room, as well as the deformation of the cabinet and driver, for a given frequency. The loudspeaker stand is placed on a hard floor some distance from a wall, which is located behind it.
The example uses a hybrid BEM-FEM approach and couples the Solid Mechanics, Shell, Pressure Acoustics, Frequency Domain, and Pressure Acoustics, Boundary Elements physics interfaces.
The model uses six multiphysics couplings:
- Acoustics BEM to Solid and Shell (2)
- Acoustics FEM to Solid and Shell (2)
- Shell to Solid (1)
- Acoustic BEM to Acoustics FEM (1)
The model is solved for a single frequency of 3000 Hz. The frequency is defined as a parameter that is easily changed.
The electromagnetic properties of the driver are supplied from the Loudspeaker Driver model (which requires the Acoustics Module and the AC/DC Module).
The vibroacoustic speaker model requires the Acoustics Module and the Structural Mechanics Module.
View more details in this related blog post: "How to Use the Boundary Element Method in Acoustics Modeling"
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.