The Sennheiser HMDC 27 Dual-Ear Over-Ear Broadcast Headset with Dynamic Microphone and Active Noise Reduction is ideal for TV and radio applications in very loud environments. The HMDC 27 features NoiseGard (active noise reduction) that actively reduces the ambient-noise level by 15 dB, increasing intelligibility while protecting the user’s hearing and avoiding stress and fatigue due to noise. The lightweight design offers extrasoft cushions and headband padding for long-lasting comfort during extended production days.