Whisper Mode for Helicopters

Anyone who has ever been near to a helicopter when it was landing knows the phenomenon: On top of the “normal” helicopter noise, there is an unpleasant, rhythmic drone. Eurocopter Deutschland has implemented a control for noise reduction, in cooperation with the European Aeronautic Defence and Space Company (EADS), ZF Luftfahrttechnik (Aviation Technology) and the German Aerospace Center (DLR): With the help of dSPACE Prototyper, the rotor blades’ angle of attack is modified to change the air flow, cutting the resultant noise by half.