I also have it. I've no doubt the various loud bikes and wind contributed. But, so did the rock concerts, the fund, the loud cars, their wind, the military, etc.
So, I take my Dramamine when I ride, and tend to ride quiet machines these days. As for ear plug, depends on the bike and situation. I don't like losing input, and ear plug do that. So on the honda, the wind is bad, so I wear them. Not on the harley because it's near silent and has no wind in the ears. Same shooting, yes at the range, no when hunting.