Joby claims that this aircraft is 100 times quieter than a conventional aircraft? That would mean that it produces 1% as much noise. So looking at some of the audible research done at Purdue University a prop plane at 1K feet is 88db. A 737 at 1NM is 97db. So 1% of these noise levels would be 8-9db’s which right next to you is barely audible. I find that extremely hard to believe.