A preliminary measurement verification of sound power level emitted by biomimetic drone propellers inspired by an owl’s feather

The research issue addressed in the project is to investigate methods of reducing acoustic emissions of unmanned aerial vehicle propellers. S.O.W.A (Silent Observer of the Wild Animals) is an arrangement that mimics the structure of an owl’s feathers. Rotor blades based on owl feathers have been constructed to suppress the noise produced during flight. Acoustic emissions, were measured with accordance to ISO 3741:2010. Sound power level of different design variants was discussed.