You may have experienced this, when you're driving with one window down why do you hear that thumping noise?

Question

You may have experienced this, when you're driving with one window down why do you hear that thumping noise?

Answer 1

Same as the answer above. I have a Malibu Maxx. If you roll down a rear window only the drumming will d**n near take out your eardrums and the headliner of the car too. We had to replace the rear sunroof shades because the drumming destroyed the retractor mechanisms when the shades were left extended during one of these episodes.

Answer 2

Called buffeting and yeah, what the first answer said. Roll down a window diagonal to you.

Answer 3

alot of unbalanced air pressure. the same reason that milk chugs out of the jug when u turn a full gallon upside down. alot of air trying to get out in your car and its hard for it to get out at the same rate. for da milk jug its da opposite.