This is all really good info. I can't believe that some riders still don't wear hearing protection on windshielded bikes. I am 68 and as of about 5 years ago I also have tinnitus(ringing in the ears) which is for the rest of my life. Hearing loss too of course. Its also age related and even with proper hearing protection, hearing loss and tinnitus can still happen especially over 60. That maybe a long way off for some people but closer than you think. I was 35 two years ago. Anyhow, the last 12 years I worked in a Pipe Mill, a very noisy environment and got to try many types of hearing protection both foam, molded and head phone type and a combination. So I consider myself quite experienced in this area. I have found that no matter what decibel rating is on the package, some are better than others depending on hardness/softness, proper installation, tolerance and comfort or in some cases even itchiness. Another thing I often see is riders wearing the same ear plugs for weeks. I have found that its best to only use foam ear plugs once. After that they begin to immediately lose their ability to expand properly. So I buy in the bulk packs at Safety Supply stores. Cheap. $20. for 500 pair or so.
Also found that, once use foam ear plugs, are the best protection possible. Heat makes them softer and much harder to install in the ear canal without folding them over or wrinkling them as in the video. The cooler they are the easier they go in and in some cases wetting them with saliva(gross but works well) makes them go in real good. 3M ones work best for me cause they are a little harder and I get them in a little deeper. Otherwise I couldn't ride. And I have tried them all. Molded ear plugs are better than nothing but not near as good as foam when installed properly. Hard to tell younger riders whats best when they know it all and have no hearing problems currently.
But like someone else said on here, if we can just convert one rider, its been worth it. Ride on!