RadioWorks Product Detail David Clark MODEL H3430 Over-the-Head Style (OTH) Features Specifications Documents 36″ straight cord Boom rotates 200° for left or right placement BTH style for applications requiring hard hats or protective headgear Contoured, undercut ‘Comfort-Gel’ ear seals for maximum comfort Flex-wire boom for easy, ‘one touch’ microphone placement Noise Reduction Rating (NRR): 23 dB Noise-Cancelling M-7A amplified electret microphone Rugged construction Noise Attenuation DataNRR23 dB Frequency (Hz) 125 250 500 1000 2000 3000 4000 6000 8000Attenuation (dB) 16.6 20.7 27.4 33 30.5 36.2 38.1 36.6 36.6Standard Deviation 2.6 2.5 2.5 2.6 3.1 3.5 3.7 3.7 3.6 No downloads are available for this product Are you ready to get to work? Get in touch and find out how RadioWorks can help your business. (800) 591-5525