this topic was just being discussed on another forum i use. here's a little of what i learned from that discussion:
at 40mph, with a helmet, wind noise becomes the DOMINANT sound at 90dB.
NIOSH limits are a little different...but safer. they use a different methodology but i think it is more accurate for our purposes...at 100dB only 15mins of exposure is allowable. for every 3dB, the time limit is cut in HALF!
i should really start using hearing protection. between the competition worthy car stereo i used to have as a teen == which left my ears ringing for an hour or two like i was at a concert, riding and racing bikes and working around aircraft, my hearing has taken a hit. i have a constant light ringing in my ears, known as tinnitus. (
http://en.wikipedia.org/wiki/Tinnitus
short rides seem to be ok with no protection, but longer rides, esecially with higher speeds traveled will contribute to hearing loss. those with d&d cans should probable be wearing double hearing protection. LOL
