This happened to me about an hour ago and the noise lasted for about 15 minutes. 2021 with 10k miles on it. No problems like this ever before today. It started about a minute after I drove off and the sound wouldn't shut off no matter what. I did the Power Button + FFW button reset and it didnt' help. I shut the truck off, got out and locked the doors and walked away and it didn't help. I did 6 or7 Master Resets and the sound would go away for a second or two and then come right back. I was driving home to get a wrench to disconnect the main battery when I stopped at a stoplight and the radio started playing like normal. My ears were ringing for 10 minutes after this. I have the truck in the garage with the battery disconnected right now and I'm hoping a hard reset like this will fix it.
I have an appointment next month because my truck recently stopped shifting into 4WD and just gives me an error message I'm going to mention this when I bring the truck in. The only other issue I have is that my steering wheel adjustment controls haven't worked in a while. I'm the only one who drives the truck, so no biggy.
EDIT to add: I noticed when I linked my truck back to the FordPass app that my truck had been updated today with: Ford Power-Up 4.2.4, whatever that is. I noticed a few others mentioned this noise outburst happening the same day their truck had been updated. I wonder if there's a connection. Maybe the update process drains the battery a bit and triggers this when you start the truck up again?