David Clark H3310 headset

3300 Series headsets are designed to provide crisp, clear communications and effective hearing protection in noisy environments. Ground support models, in particular, are designed to interface with standard commercial aircraft intercom systems and 3800 Series de-icing intercoms.
The H3310 model is a double-ear, headband-style headset capable of providing comfortable, clear communication in the most demanding environments. It uses the DC-1A dynamic amplified noise-canceling microphone housed in a noise-attenuating shielding assembly, designed for noise environments above 125dB, and includes a double strap assembly to keep the microphone protector in front of the mouth at all times. Momentary PTT allows microphone transmission only when needed.
Durable construction and quality components are found in all 3300 Series helmets. Comfort features such as ear seals and head cushion are specifically chosen for exceptional comfort whatever the temperature or environmental conditions.
Noise-attenuating ear cups provide clear, isolated reception, and the H3310 offers 26dB of hearing protection. David Clark created the world's first noise-attenuating communication headsets, and continues to lead the world in offering quality communication tools.