When you are sitting still, run the windows down and then all the way up.
Bump the up switch a couple times more.
I haven't had the whistle, but there was briefly a concussion feeling.
It was related to taking the p-side front window down while in motion.
I lowered the rear glass, raised the front, then raised the rear.
There is a different air flow over the front and rear windows.
The concussion feeling did not return.
But that may not be your problem.