Elastic waves and vibrations are an important part of acoustics. The Acoustics Module is therefore equipped with an extended version of the base package Solid Mechanics interface shipped with COMSOL Multiphysics. This interface contains less features compared to the full Solid Mechanics interface available with the Structural Mechanics Module.

The Solid Mechanics physics interfaces are found under the Structural Mechanics branch () or as a shortcut Solid Mechanics (Elastic Waves) under the Acoustics Module branch () in the Elastic Waves folder.