How about toss up some information, like your height, helmet brand and even the brand of ear plugs. Even the worse ear plugs should be taming any buffeting noises down to something that is not dangerous to your hearing, most are attenuated to -20 decibels.
I am just a scratch over six feet, I wear a Shoei Neotec and use no ear plugs. I do have speakers in the ear pockets as I am usually listening to music when out on the bike. I did order the Powerbronze tall windcreen as I get just a tad of buffeting with the stock screen in the high position at highway speeds. For me, I get just a tad of wind noise into the helmet above 65 MPH, nothing bad but no where as quiet as my Tiger Explorer was with a heavily modified windcreen setup.