BEM acoustics simulation of sound radiation and scattering in time domain BEM acoustics is an Open Source MATLAB Toolbox published under GNU General Public License. Study and predict sound quality and noise reduction by modeling acoustic behavior using COMSOL Multiphysics® and the Acoustics Module. Learn more here.

Products and designs involving acoustic phenomena can be modeled to study and predict factors like sound quality and noise reduction performance. The Acoustics Module is an add-on to the that provides tools for modeling acoustics and vibrations for applications such as speakers, mobile devices, microphones, mufflers, sensors, sonar, and flow meters. You can use the specialized features to visualize acoustic fields and build virtual prototypes of devices or components. For more detailed studies, acoustics can be coupled with other physical effects, including structural mechanics, piezoelectricity, and fluid flow. Chemical Reactivity. The COMSOL ® software contains multiphysics couplings to enable you to evaluate the performance of a product or design in an environment that is as close as possible to the real world.

The Acoustics Module also includes many specialized formulations and material models that can be used for dedicated application areas, like thermoviscous acoustics used in miniature transducers and mobile devices or Biot's equations for modeling poroelastic waves. The multiphysics environment is extended further with several dedicated numerical methods, including the finite element method (FEM), boundary element method (BEM), ray tracing, and discontinuous Galerkin finite element method (dG-FEM).

To model pressure acoustics effects, such as the scattering, diffraction, emission, radiation, and transmission of sound, you can use the pressure acoustics interfaces. Problems are modeled in the frequency domain via the Helmholtz equation or in the time domain via the classical scalar wave equation. There are many options to account for boundaries in acoustics models. For instance, you can add a boundary condition for a wall or an impedance condition for a porous layer. Sources like prescribed acceleration, velocity, displacement, or pressure can be applied on exterior or interior boundaries. Further, you are able to use radiation or Floquet periodic boundary conditions to model open or periodic boundaries.

The physics interfaces for pressure acoustics can be used to model the behavior of sound propagation in complex media, such as porous materials. Several poroacoustics fluid models, such as the Delany-Bazley or Johnson-Champoux-Allard (JCA) models, prescribe losses in porous or fibrous materials.