Hello, I am Researcher in aeroacoustics. I use variety of experimental, numerical and analytical tools to study generation, propagation, and scattering of sound waves.
Aero+Acoustics is a branch of science that deals with noise generation via unsteady aerodynamics.
How is noise generated ?
In a vortex both centrifulgal forces (due to rotation) and pressure forces balance each other. However, any distortion or stretching of vortex will break this "balance" and induce corresponding pressure disturbances that can propagate as far-field noise.