I have becaome a true believer! I've ridden scooters for 4 years now with a 3/4 helmet and face shield, 50cc for 2 years and 150cc for 2 years. I never felt the need for any hearing protection.
New scoot is a 250cc. While they were replacing my fuel pump I had them add a top box and small fly screen. Picked it up Saturday and have put about 200 miles on it since then. I became aware that it is now a MUCH noisier bike to ride - guess the fly screen redirects air from my gut to my head. I am still too claustrophobic for a FF helmet.....
Stopped today at hardware store and bought a pair of ear plugs - silicone, each with 3 concentric rings getting larger, like a Christmas tree, attached by a plastic string. Comes with a small case about the size to carry a pair of in-ear hearing aids (get the message here?) Cost: under $4. Box says they reduce noise by 25 decibels. Put them in and went for a ride.
What a difference. I said:"WHAT A DIFFERENCE!!" I could still hear the scoot, kids shouting at a playground, guys working with power tools. But when I stopped and took them out, I could hear everything very clearly with no residual problems from wind noise. Wow. It's hard to put into words, but the experience was shocking to me.
I'm an acapella singer and a trial attorney. Both require the ability to hear nuances and changes in the human voice in all ranges. My hearing is so important to me, and I had NO IDEA how I could be damaging it on my scooter until today. I don't want to preach or offend - just sharing my personal testimony. Even cheap plugs can save your ears!