Day: January 6, 2025

Mix and Matching Propellers Reduces Noise

It took some outside-the-box thinking by the folks at Aurora, a Boeing-owned company, to arrive at this invention. They asked the question “but Why are drones so loud?” The answer is not so simple: constructive interference. When a propeller spins, it has a noise profile. This noise profile is part spinning motor, part propeller’s interaction with air. This profile has peaks and valleys. Add 3 more propellers with identical noise profiles, and the peaks and […]