Incorrect, the engine exhaust noise far overwhelms the fan blade air. But sure all sound must travel thru the air. Smarter blade design would cut some noise down as well. And remember the engines are usually most efficient at some high RPM. That’s why hybrids rev up their engine even when not moving the car…just being efficient.
I thought the noise was mainly due to the air, so I don’t really see how switching to electric ones would help
Incorrect, the engine exhaust noise far overwhelms the fan blade air. But sure all sound must travel thru the air. Smarter blade design would cut some noise down as well. And remember the engines are usually most efficient at some high RPM. That’s why hybrids rev up their engine even when not moving the car…just being efficient.