Some people must have sensitive ears as I can't handle riding with ear plugs in, I love to hear my motor and always hear when the sound changes saying something is not right, but lucky on my Norton that is very rare or a sound coming from somewhere else on the bike like a rubbing or scrapping noise somewhere.
My flip top helmet makes a lot of wind noise but my open face helmet is quiet, but I ride with my open face all the time the flip top is for traveling or bad weather riding only, the open face helmet has less restrictions and can turn my head more than with a full-face helmet, but of course I always get the "full face helmets are safer crowd" well after 50+ years of riding with open face helmets I still have my good looks and all my teeth, well most of my old teeth lol.
It's strange even very expensive helmets can make a lot of wind noise and fitting a helmet in a shop for fit but unable to find out whether they are quiet or not till after you pay for them and ride the bike and of course everyone's heads are different shapes, so hard finding that right helmet but my last new open face helmet has been the quietest helmet ever and took me 3 bike shops to find the right fitting helmet and was one of the cheaper one that fitted right and it also have the locking clip on the back for the googles, not many helmets these day put that clip on the back, I lost my old English flying googles from my previous old helmet without a locking clip on the back, I was pissed off as they weren't cheap googles.
Ashley