In many applications, analysts are very interested in understanding the noise generated by either turbulent fluid motion or aerodynamic forces interacting with object surfaces. In ground vehicle and transportation, the wind noises that the passengers and nearby residents hear are directly related to the noise predicted by aerodynamics calculations. Jet engine exhaust is another source of acoustic noise which has detrimental effect to the environment and the exhaust nozzle structure. HVAC and fan noises are concerned by every design engineer.
Polaris CFD is capable of computing complex transient turbulent flow, so that its aeroacoustics module can predict accurate flow-induced noises from pressure fluctuations. This brings another dimension of postprocessing, listening to your simulation. Other acoustics related quantities can be visualized in postprocessing as well.
Aeroacoustic simulations generally require longer simulation time to capture the full spectrum of airborne noises in audible frequency range, typically from 20 Hz to 20 kHz.