The Effective Device
The vortex generator has been developed by the DLR or the German Aerospace Centre and it diverts the wind from the vents that are on the underside of the wings on the Airbus 320. This is highly effective in reducing the sound that emanates from the aircraft, just before the flaps & landing gear are being deployed for landing. The sound that you could hear before using the vortex generator is akin to that of the sound that a beer bottle makes when it is being opened – on a much larger magnitude though. The head of the Department of Technical Acoustics at DLR, Jan Werner said that if you are listening to an aircraft that is landing, this is a very distinct sound that can be heard.