Sometimes I wear them, sometimes I don't. I should wear them every time I ride, since I already have a hereditary high frequency hearing loss that showed up when I was a sophmore in high school. I've lost 65 db at 2000 hz in my left ear and 60 db at 2000 hz in my right ear. That's right at the point of most women and childrens voices. My weaker left ear rings constantly. My problem with ear plugs is, the sounds that you all can hear while wearing ear plugs, I can barely hear without them due to my bad hearing. So, with ear plugs in, I have trouble hearing sirens, other vehicles or traffic, etc. I still should wear them everytime I ride to keep my hearing from getting worse. Both my ears ring for days, left ear just rings louder, after a long ride without them.
I wear the foam type at work, and when I ride wearing them, I use the x-mas tree type like these
http://earplugstore.stores.yahoo.net/holesmreearp.html. They work, are reusable, can be cleaned, and are very inexpensive at Lowes, Home Depot, or stores that sell building materials and power tools. Some have a string attaching them together. Just pull it out or cut it off for use under a helmet.
I definitely recommend that everyone wear some type of hearing protection while riding, using power tools, weedeaters, mowers, etc.....or you may end up needing to wear hearing aids like me. Anytime your ears ring for a while after riding or after any other extended exposures to loud noise, you've done damage to your hearing. Once you lose all or part of it due to excessive noise, nothing can bring it back. Can't be corrected by surgery........NOTHING WILL BRING IT BACK. Hearing aids will correct a partial loss to a point. I can hear things I haven't heard in years with them, but the sound from them is not natural. I did without them for years, then finally broke down and got fitted because I was missing so much, not being able to hear what my grandkids were saying most of the time.
Don't mean to rant, but take it from someone who knows what it's like to have trouble hearing. Spend the $2 or so and save your hearing.
'05 CBR600F4i
PCIII USB
-1 Front +2 Rear/Speedohealer
Various screens according to my mood
Hindle Hi Mount slip on oval supersport core
K & N air filter
Matris M3 Damper
Vortex Rearsets
BRG Racing 1/5 turn throttle
Pit-Eck undertail and hugger