3 ms·
It's not like helicopters or planes are quiet either. Moving large volumes of air in the downwards direction creates noise.
by phire 10y ago
It's not like helicopters or planes are quiet either.
Moving large volumes of air in the downwards direction creates noise.
- GFK_of_xmaspast 10y agoIt's also not like helicopters or planes typically hover over a park.
- mikeash 10y agoHelicopters and planes exist in relatively small numbers, and their movements are often modified to reduce the impact of their noise. A nitpick: almost all fixed-wing airplane noise comes from the engines, not the downward movement of air. Listen to a glider and a light powered airplane of similar mass for a good illustration. Helicopter noise is more complex.
- phire 10y agoIt wasn't until I moved into a house under the final approach (for the least commonly used runway) that I realised this is untrue. On a calm night with no wind, the wake turbulence makes a significant amount of nose that lasts for several min after the plane passes. Normally wind noise drowns it out, but due to the longer duration the total amount of noise is equal-to or greater than the engine noise.
- milesokeefe 10y agoI've heard that the high pitch noise multi-rotors make is primarily from the motor ESCs, so those could potentially be made more quiet.