03-11-11, 10:59 PM
(04-10-11, 09:14 AM)GrahamB link Wrote: IHow was this measured I wonder?I recall "Ride" magazine did some testing of noise levels in helmets using calibrated in-ear microphones a few years ago. Aside from the bit of thin cable trailing out of the rider's lughole it looked a pretty accurate representation of normal riding conditions. Quite scary too, typical noise level at 70mph was around that at which industry gets hassle from the HSE if workers get exposed to more than an hour's worth per day. At 100mph hearing damage starts within minutes. Kinda wish I'd started wearing earplugs sooner!