I forget just how it was said by somebody else, but it was best suggested to just get yourself a Gold Wing if you're expecting the protection from the elements.... like that which you might get from a Gold Wing. Our "SPORT TOURING" bike is far, Far, FAR from being a bike built around a 'barn door' of a windshield.
You get one of four things behind a windshield:
1) "Clean air" resulting in absolutely minimal wind noise while your helmet is fully immersed in the oncoming air, but your chest is relieved of the onslaught of the wind.
2) The oncoming air hitting you somewhere mid-helmet resulting in:
a. annoying turbulence with with 'livable' wind-noise
--------- or -----------
b. annoying noise but with 'livable' turbulence
3) Either you're tucked down so low behind the shield, or you've got a hideous barn door of a windshield in front of you, that you feel NO TURBULENCE, but HEAR the mechanical noise of your (quiet/noisy) bike.
I accept getting the wind off my chest, allowing that the wind hits me mid-helmet, and I always, ALWAYS wear ear protection. (Keeping in mind that I'm enjoying the motorcycle experience, and NOT caging it on two wheels.