Drones and fans can be made quieter by the results of the Hummingbird Hummingbird Study. A team of Dutch researchers, among others Succeeded To find out the exact origin of wing sound for the first time in a flying animal.
The hummingbird is known for its low “hum”, a sound that comes from its fast wing rhythm. How a grand piano creates that distinct sound is now clear.
Researchers from Eindhoven University of Technology, Surama Eindhoven and Stanford University measured the wing noise of six hummingbirds when they drank sugar water in-flight from a fake flower. They used 12 high-speed cameras and 2,176 microphones.
The results show that the soft and complex wings of a hummingbird make noise in the same way as the wings of a simple insect. Unlike other bird species, the hummingbird generates a strong upward aerodynamic force during ascending wing strikes and lower wing strikes.
According to researchers, new ideas could make drones, vacuum cleaners, fans and airplanes quieter. They wrote: “If you know how animal’s complex aerodynamic forces produce sound, you can use this knowledge to make flying or moving devices that generate complex forces quieter.”
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