This module has extra functionality for simulating acoustics in pipe networks. You can access this functionality under the Acoustics > Pipe Acoustics branch () when adding a physics interface. The documentation of the Pipe Acoustics interfaces is found in the Acoustics Module User’s Guide in:

In the Acoustics Module User’s Guide you also find information about all the other acoustics physics interfaces as well as about the multiphysics coupling to Pressure Acoustics.