The hummingbird is named after its pleasant humming sound. But only now has it become clear how the wing generates this sound. Researchers observed hummingbirds using 12 high-speed cameras, 6 pressure plates and 2176 microphones. The soft and complex feathered wings generate sound in a fashion similar to how the simpler wings of insect do. These new insights could help make fans and drones quieter.
Click here for original story, How hummingbirds hum
Source: ScienceDaily