Having splitting headaches after riding.

[Water Warrior 2]

A lot of wind and wind noise comes from below the wind shield on many bikes. This can be quite sucessfully remedied with lowers attached to the front forks to divert the wind. Take a look at some of the bigger cruisers and you will see them.
The lowers can also eliminate the buffeting your helmet receives and shakes your eyes half way out of your head.
Another method used is putting a leather or fabric panel on the crash bars to redirect the wind, rain or cold air in the chilly season. The panels just happen to do the wind noise, buffeting prevention thing as a nice by-product.