car makes a droning sound when accelerating...what could this be?

Noises are tough for us on RepairPal to really get to the bottom of. A droning sound sounds like resonating of the engine or exhaust on the subframe or body. Hard to say, really. The best thing to do is to find a local shop you can trust and have them road test with you. It may be an easy thing to spot. Most shops will road test with you complimentary. Here's a list of some shops near you - click this link: https://repairpal.com/ford-repair-in-beverly-hills-california