I swear it's louder than the Inspire 1.  The amount of electric squeal you can hear when moving slowly, even 400 feet up, is crazy.  Is this normal for everyone else?  Also, this is posted in Phantom 4 and not Phantom 4 Pro because the posting option to select Phantom 4 Pro is not working.

There may sound a little high, but it shouldn't be horrendous. Could you happen to provide a small video to get a better understanding? Is this right out of the box, or did you notice this after a firmware update or hard landing?