One of the downsides that keeps drones from being widely used is the noise they make. This study presents an optimization process of aerodynamic noise reduction for a new propeller designs at the Propulsion Systems Laboratory, School of Mechanical Engineering, Hanoi University of Science and Technology. Using new propeller designs and numerical simulation approach with Broadband Noise Source model, four toroidal propeller designs parameter such as number of blades (NOB), spanwise configuration, the width of the blade in the radial direction, tip geometry are considered. The outcome results show the Acoustic Power Level (APL) figures and Thrust between four geometry studies’ models. The propeller having a NOB of 3 in general gives the most optimal efficiency in terms of both thrust and APL, where APL at the output cross-section diminishes from nearly 139–1121 dB and Thrust increase from nearly 6.2 to 8.7 N.