Loud high pitched whining noise coming from my heating vents when I accelerate. on 2001 Volkswagen Cabrio

It only occurs when I am going more than 35 mph. If I open the windows, the noise decreases slightly, but is still there. I am almost certain it is in the interior - not the engine. It started 3 days ago.

Side note:
Vent has always also made a small rustling noise when I have the main vents (over the center console) blower on foot. I have to toggle the drivers vent and the center console vent to make it not make any noise...

Anyone else experience this at all?

Asked by for the 2001 Volkswagen Cabrio
No u must have a dud..