David Clark Model H3331 Aviation Headset

• Wire Boom allows for microphone/boom placement on the right or left side.
• M-1/DC Amplified Dynamic Noise Canceling Microphone
• Momentary PTT(Push-to-Talk) Switch on ear dome.
• Soft Headpad and Ear Seals guarantee exceptional comfort.
• 15 foot straight cord with (SC-267) Plug to mate with Series C31-XX Extension Cords.
• Corrosion-proof, chrome plated Headset/Stirrup Assembly
• Certified Noise Reduction Rating of 24db

  NRR 24 dB NOISE ATTENUATION DATA - MODELS H3331 Frequency (Hz) 125 250 500 1000 2000 3000 4000 6000 8000 Attenuation (dB) 14.3 21.5 27.1 31.8 36.0 39.6 41.8 39.7 37.0 Standard Deviation 3.3 2.4 1.5 1.6 1.3 2.1 2.1 2.0 1.3