Originally Posted by murellus
yes your ears feel a pressure change but it's very small, a couple psi at most. 10psi vacuum over the upper surface of the car at highway speeds would be bad bad bad.
My estimate was 10 psf, not psi. 10 psf = 10 / 144 psi. Your eardrums can rupture at 5 to 10 psi sudden changes, so "a couple psi" is quite a bit.