You can use ports to excite or absorb acoustic waves at the inlet and outlet of waveguides using multimode expansion. For instance, you can add a boundary condition for a wall or an impedance condition for a porous layer. There are many options to account for boundaries in acoustics models. In the time domain, time implicit (FEM) as well as time explicit (dG-FEM) formulations are available. In the frequency domain, both FEM and BEM are available, as well as hybrid FEM–BEM.

Simulations run in the frequency domain employ the Helmholtz equation, whereas in the time domain, the classical scalar wave equation is used.

You can model pressure acoustics effects, such as the scattering, diffraction, emission, radiation, and transmission of sound. Pressure acoustics is the most common use of the Acoustics Module. In addition to the finite element method (FEM), the Acoustics Module features the boundary element method (BEM), the discontinuous Galerkin finite element method (dG-FEM), and ray tracing. The multiphysics environment is extended further with several numerical methods. The Acoustics Module also includes many specialized formulations and material models, like thermoviscous acoustics, used in miniature transducers and mobile devices, or Biot's equations, used for modeling poroelastic waves. The COMSOL ® software includes multiphysics couplings that enable you to evaluate the performance of a product or design in an environment that is as close as possible to the real world. You can visualize acoustic fields and build virtual prototypes of devices or components.įor more detailed studies, acoustics can be coupled with other physical effects, including structural mechanics, piezoelectricity, and fluid flow.

The Acoustics Module is an add-on to the COMSOL Multiphysics ® software that provides tools for modeling acoustics and vibrations for applications such as speakers, mobile devices, microphones, mufflers, sensors, sonar, flowmeters, rooms, and concert halls. Products and designs involving acoustic phenomena can be modeled to study and predict factors like sound quality and noise reduction performance. Analyze the Acoustics and Vibrations Behavior of Your Products and Designs

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