David Clark Ground Support Headset H3312

The David Clark H3312 is a dual-ear, over-the-head style headset designed for airline ground support and high-noise environments. It ensures clear communication and effective hearing protection, making it ideal for commercial aircraft interphone systems and de-icing intercoms. FEATURES • Noise-canceling microphone for clear transmissions • Foam-filled ear seals for comfort in all weather conditions • Durable construction with carbon steel hardware and chrome finish BENEFITS • Enhanced communication clarity in noisy environments • Comfortable for extended use, even in extreme temperatures • Reliable and durable, ensuring long-term performance SPECIFICATIONS • Weight (without cord): 20.4 oz (578g) • Ear Impedance: 300Ω each, wired in series • Ear Sensitivity: 90 dB SPL/1mW @ 1kHz • Ear Frequency Response: 200 to 5,500 Hz • Mic Impedance: 150Ω nominal • Mic Sensitivity: 400mV ± 6dB into 150Ω load @ 1kHz for 114 dB SPL input • Mic Frequency Response: 150Hz to 8kHz • Mic DC Supply Voltage: 8-16V, 220 – 2,200Ω (not polarity sensitive)