This section shortly describes the theory behind the Lighthill acoustic analogy used in the Aeroacoustic Flow Source. Then the hybrid computational aeroacoustic (CAA) method used is introduced. Finally, best practices for setting up an aeroacoustic model in COMSOL using the Aeroacoustic Flow Source, the Aeroacoustic Flow Source Coupling multiphysics, and the necessary study steps such as Transient Mapping and Time to Frequency FFT are given.