Peltor H10A Professional Noise Canceling Earmuff
Peltor's dual cup patented Twin Cup design minimizes resonance achieving maximum high and low frequency attuation. This patented design provides the highest noise reduction rating for an earmuff tested in an approved laboratory. The H10A provides effective, lightweight, comfortable protection for noise levels up to 105 dB. CSA Class ALAm I glad I got these ear muffs or what! I work in San Diego and nearby is an airforce base. Continuously during the day, helicopters and jet planes fly overhead. Added to that, my annoying co-worker stretches and yawns, pops sunflower seeds into his mouth and makes weird chewing noises and is responsible for miscellaneous sounds. I did try the Bose sound canceling headphones once, but they gave me headaches. These earmuffs worked just as other reviewers raved about. An added bonus was that the keyboard noises were also reduced significantly. For the price, these things should be mandatory in most offices with shared cubicles!
this infomation from Cheap Earmuff Store
