I tried my stock windshield on the low position. It's better. Still noisy, but better. The lower and upper positions move the shield away from the fairing so some air can get under there. I think that probably makes more difference than the height. I have a givi ordered tho. If you don't get yours in time that's something you could try.
And definitely wear earplugs. Not only will it save your hearing (I have significant hearing loss and tinnitus and wouldn't wish it on anybody) you won't get so exhausted from the constant rush of wind noise day after day. -al