A word of warning for you if it helps you avoid what struck me in 1993.
I was doing 25k miles a year on a K BMW tourer around my territory tuning pianos in Devon.
I was silly and failed to wear earplugs to protect my ears from LOUD wind-noise in my Crash Hat, and added noise funnelled up from the barn door fairing and after a long 400 miles journey one day, I got back and my ears were screaming with Tinnitus - high pitched whistle with built-in White Noise. This happens to the Police riders too if they do far too much high speed work.
Usually a nights sleep would find the ringing subsided by next morning but on that occasion it was here to stay.
I got very very scared and when it was still with me at around 65decibels 24/7 I went to see a Consultant ENT Surgeon and several Audiologists and they found that I'd damaged the Cochlea hair cells that are responsible for hearing certain frequencies - through unprotected noise-input. Also the damage had sent me partially deaf. The ringing is the damaged hair-cells sending phantom signals to your brain and you hear masses of ringning, whooshing, high pitched screaming - but it can't be measured using a microphone in your ear because it's not real sound - it's nerve-path creating noise that wasn't there before.
All my motorcycle riding from then onwards was done with sponge expanding earplugs in place, to prevent more noise damage. Helmets are notorious amplifiers of wind roar. Typically at about 80mph the noise levels are around 95db which is 10db louder than you would be allowed to work in, on an 8 hour shift without wearing hearing defenders (by law).
It does make sense to use plugs. I noticed when Kevin Schwantz won the British Grand Prix in the early 1990s he threw his helmet into the crowd and then took two blue earplugs out of his ears. A surgeon at Plymouth did a test of the hearing of many Grand Prix riders and all of them had measurable hearing losses.
Believe me it isn't nice to find that you have ringing in the ears 24/7 and it still hasn't gone away after 18 years! It was a struggle to remain sane I can tell you. Now the only thing that busts through the ringing is wearing digital hearing aids that amplify the environment so much that it covers up the ringing.
So I hope you don't get stricken with it permanently. It's the roar of the wind mainly that causes it and it's the same damage that even young people can get being exposed to very loud speakers at Rock Concerts. Bear in mind that 105db can't be endured for longer than about 30 seconds a day before damage occurs. 90db you can get away with about 30 minutes a day.
It ain't worth it, even though bike riding is a drug, and I won't give it up, I do now protect whenever I'm going to ride fast more than about 5 minutes riding. Good biking to you.
Laurie
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Plado
Went on a 200 mile run yesterday in awful weather & when I got home my ears were ringing. The protection was great but I was deaf. By raising my hand I could tell where the screen was ceasind to do its job. Have ordered the Skidmarx one. Probably wasted my money but it hasnt cost the earth. Will post results when it comes.