The David Clark Model H10-56, designed specifically for helicopter use, has the best noise attenuation with a Certified Noise Reduction Rating of 27 dB.Designed specifically for Helicopters it provides the comfort all rotary pilots require by coming in at 20 oz while providing a whopping 27db of hearing protection. This unit comes standard with a 5ft coiled cord and U-174/u plug and Hinged wire boom with M-101 amplified Dynamic Mic. It is also fitted with Flo-Fit Undercut Gel Ear Seals.
