The A2 (AeroAcoustic) wind tunnel is one of the main test facilities of the Engineering Fluid Dynamics (EFD) Group of the UT. It is also known as the 'silent' wind-tunnel because it walls has a special treatment meant to absorb practically all the noise produced by the air flow, which can reach up to 240 km/h. Thanks to that, the tunnel is suited for measuring simultaneously the aerodynamic and the noise of applications related to aviation, drones, green energy production and home appliances.