The above product is a black rubber edging that goes on a m/c windshield to increase the size/shape of the air pocket. The newest stuff is Generation-4, and it does have a different profile from the older configuration, so if you've tried this product before and really liked it then (as did I) you may like it even better now.
I know from reading other posts that "sometimes" this seems to do little on SOME windshields. . .but. . .
On my R1100RS STOCK windshield, this product dramatically improved the pocket, and correspondingly dropped the wind noise at all speeds, even with the shield in lowest position. The RS has a pretty small stock shield which looks great with the lines of the bike, and now it actually, you know, SHIELDS me from the slipstream. YRMV, but this may be a bargain solution to quieter riding, and buying a new windshield may --- or may NOT --- help as much as this edging. I like the look of it, too, but this is a personal thing.
These guys have been in business for a long time, and are very helpful with advice and counsel on your particular machine. Airflow around a windscreen is a complex topic, as many of you know, and it gets expensive to go the trial-and-error route.
I'm not a shill -- I just like passing along information on excellent products and vendors that serve our anally-retentive community.