Microphone grid: Spatial free-field correction curves
Application ID: 14409
This is a conceptual model of a microphone placed in an infinite baffle (flush mounted). The purpose is to determine the free-field level correction curve of the setup, which includes the exterior domain, microphone grid, and volume between the grid and the diaphragm. The microphone diaphragm is characterized with a simple RCL impedance and the open radiation condition is modeled with a Perfectly Matched Layers (PMLs).
This model uses the Acoustic-Thermoviscous Acoustic Boundary multiphysics coupling to couple Thermoviscous Acoustics to the exterior Pressure Acoustics. Thermoviscous acoustics is used to model the acoustics in the small domain between the diaphragm and the grid, calculating the pressure distribution, temperature fluctuation distribution, and velocity magnitude. Pressure Acoustics is used to calculate the incident and scattered pressure fields in the exterior domain.
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.