Originally Posted by newbie101

It could just be that each of us has a higher sensitivity and/or level of attentiveness either to sound or to wind noise in particular.

For those with a higher level of sensitivity, traditional forms of hearing protection will work well. Based on my measurements, sound levels in average traffic, at at a bit higher than average cycling speed (low 20's mph), is typically between 65 and 85 dBA. With less traffic, and at slower speeds, wind noise levels will be lower.

I've recommended the etymotics, and I think these are a good solution since they bring sound levels down to what is typically experienced inside of a quiet sedan (45 to 65 dBA).

For those who only want to reduce wind noise in particular, wind blox and cat ears are designed to do that. Wind blox seems to receive good reviews, whereas cat ears seems to receive mixed reviews.

A change of helmets may work, but this is typically the most expensive solution and I have not yet read any reviews or seen any data which offer clear evidence that certain conventional (ie non aero) designs are significantly quieter.