Just to clarify, you measured hummingbirds at 50db? Birds had millions of years to optimize for lower energy consumption which makes me wonder if it could be m

Just to clarify, you measured hummingbirds at 50db? Birds had millions of years to optimize for lower energy consumption which makes me wonder if it could be mechanized. I understand where you're coming from with the plane analogy. I'd argue that a lot has been done to cabin acoustics the demand is that its quieter while you're on a flight. The desired for quieter drones stems more from 3rd parties.