i used to have a convertible, and i must admit i think it affected my hearing, although it could have been me standing near jet engines at full tilt without ear defenders, or working in workshops for long periods of time. or dabbling in stupid sized engines without ear defenders. or all the loud music i used to listen to, or the clubs i used to come out from with my ears ringing.
my hearing is screwed, i'm partial deaf on one side, and i'd still proably go back and do all the things i did. but maybe i'd wear protection more often next time