Explaining the sound is one thing, but it would be best if you captured a video at different speed and maybe one of us can pinpoint the problem. I've never heard that sound and I've driven fast before, well probably all of us had a little fun driving fast. There is definitely a problem.
Doesn't sound normal to me. Mine is pretty quiet at 90+. Perhaps there's an issue with the bearings? When i'm going that fast I only hear wind noise, mostly.
I had a similar noise that turned out to be a rear wheel bearing. Technician used a stethoscope to find it.
Thanks for the video AkalStation. Two questions, did you buy the car off Home Depot's lot and if so are you sure you did not purchase the lawn mower package rather than a Tesla certified vehicle? I am just kidding. This is definitely not normal. I would suggest it being the tires / road, but you would notice a difference immediately if you drove on another road. Do you slow down faster than normal??? If you accelerate quickly does your motor make a noise? And it might be a problem with one of the rear wheels.
My best guess would be tire roar, but it's impossible to tell from a video (of any type). I'm sure Tesla will take care of you and this will blow over.
I had a similar problem and the service center replaced the drive train. Went away for a few months but it's back now and louder than before. Almost sounds like the car has an exhaust. Strong Noise when driving above 67mph