When I'm out for an extended blat, I use goggles and a leather helmet http://www.steampunkemporium.com/store/005163S.php
along with earplugs. I have noticed, if I cup my hand over my right ear (in my RHD car, it's most exposed to the wind) the buffeting is reduced. I'm thinking about finding/fabricating shells to cover my ears under the leather helmet to be a barrier. Sort of like the head gear wrestlers wear.