The subject of this study is the acoustic characteristics of the propeller of an unmanned aerial vehicle. The object of this study is the propeller of an unmanned aerial vehicle. The purpose of this work was to assess the influence of the shape and number of blades on the change in the sound pressure level of the propeller of an unmanned aerial vehicle. https://www.bekindtopets.com/hot-find-Synovex-One-Grass-Extended-Release-Implant-10-Dose-special-find/