When I'm on the highway and there are strong gusts, I can hear a loud tone similar to a call waiting tone, or someone blowing on the mouth of a beer bottle. lt is pretty loud and distinct, you can't miss it and you'll swear it is coming from the area around where the rearview mirror is mounted. l would shut down my gps, then radio, then phone thinking it was some kind of tone from one of those devices it sounds that electronic.
i don't know if that is what others are hearing, but that is what l get. Maybe my truck is haunted.