Originally Posted by mrad01
I had the same issue with my Remus.
Turned out that my number plate (US translation:license plate) was mounted really badly and was amplifying the sound through the boot lid (US translation:trunk lid)
I spent an hour taking the plate off and covering the back of it with felt tape and re-mounting it.
Drone almost eliminated. Good enough for me!
Ohh, if only it was that easy for me. Tried it with the plate off and no joy