As it turns out, wind rushing around the rider is the biggest source of noise experienced by most motorcyclists, assaulting your ears with everything from booming low-frequency vibrations to whistling high-frequency noise. “Below about 40 miles per hour, machine, exhaust, and road noise predominates,” says Etymotic Research’s Doctor of Audiology Patty Johnson. Pick up the pace, however, and wind noise quickly becomes the main culprit—and a deafeningly loud one at that. Depending on the style of motorcycle you ride, cruising down the freeway at 80 mph may subject your ears to noise in excess of 110 decibels. That is equivalent to running a chainsaw at arm’s length and is loud enough that OSHA warns that without hearing protection you should limit exposure to 15 minutes or less per day. We don’t know about you, but we certainly want our rides to last more than 15 minutes!