Monster Persona Active Noise Cancelling HeadphonesDetails: High performance dual noise sensor microphones, two noise sensing microphones per ear one feed forward and one feed back on the surface of the headphones catch more of the ambient sounds of your surroundings, whether its in flight noise, city traffic or office chatter. Immerse yourself in sound all around you. As real as if you are there at a live concert or with the artist recording in a studio. Adaptive sound control ,a smart function that