Comment by aidenn0

Noise at takeoff depends on the propeller geometry a lot. A necessary (but not sufficient) requirement for a quieter takeoff would be lower propeller tip-speed.

One of the ways to achieve high thrust at low tip speed is to have larger total propeller surface. The best shot of the propellers is around 9s and these don't look like particularly large propeller blades, but there are 20 propeller blades compared to 8-12 that you might see on a 50-ish seat turboprop airliner.

But it's unlikely to ever be quiet to lift 20 tons into the air.