DAVID CLARK COMPANY INC. > HELICOPTER HEADSETS > DC H10-76PRODUCTS > DAVID CLARK COMPANY INC. > HELICOPTER HEADSETS > DCCI H10-76 DC Helicopter Headset - MODEL H10-76 NSN 5965-01-390-9240 Special features: Passive / Military NRR: 24 dB Impedance: Low Earphone Type: Dynamic Noise-Canceling Mic: M-87 Dynamic Earphone Impedance: Low Impedance / 10 ohms. (19 ohms each; wired in parallel Mic Impedance: 5 ohms +/- 20% Earphone Sensitivity: 90 dB SPL on flat plate coupler, re 1mW input @ 1KHz Mic Sensitivity: .05 -.11 mV at 1000Hz with input of 103 dB SPL Earphone Frequency Response: 100-5,500Hz Mic Freq Response: 300-3000Hz Earphone Plug: U-174/U Mic Plug: U-174/U Boom Type: Hinged Wire Cord: 5 ft.Coil Headpad/Hardware: Super-Soft Headpad Weight/Headset Only: 19 oz.