Use the search - this thread was literally 5 rows under the one you just started:
I have been looking for options to reduce wind noise. I bought these based on DB reduction. I haven't seen anyone talking about these so here it goes. Also all of these will allow you to listen to voices/music etc at a reduced volume. All of them reduces a certain amount of DB of wind...
www.gtamotorcycle.com
Lot's of good suggestions and info in there.