With the fabric top raised, the Audi S4 does an admirable job of keeping wind and traffic noise at bay thanks to its new acoustically-improved top design. Now, the main aural irritants surface from the tires and suspension, which generate more racket than a $63,000 automobile ought to. Drop the roof and all that road noise dissipates, replaced by cabin buffeting that can only be quelled by installing the windblocker over the rear seats and keeping the windows up.