Im fussy about things stuck in my ears so I made foam inserts in the ear cavity of my helmut. Helps some.I think the fact that my 2015 650 stock muffler is so quiet,which I admire,makes all the other mechanical and engine sounds stand out. And after a long day riding certain sound frequencies can become very annoying! For instance...Ive done a lot of dicking around under the lid of my bike. Had the front fairing off at least a half a dozen times, LED headlights,relay,aux lights, turn signal running lights, side fairing lights,power charger,GPS compass. Now Ive developed what seems to be a buzz around 5500 RPM,right in my sweet spot. Could be loose wires,even a loose pop rivet. So next time in Im gonna clean up some loose wires,put some vibration damping,do my best. But I may not find it. Ive seen a fairing buzz fix on earlier model Versys. I like listening to the engine for shifts but may switch to some fancy musician earplugs,the ones that only filter the very high end. I guess my point is,its kinda psychological the way certain sounds can grind you.