The GL Dual G2 is designed to filter out background noise. There are two mics on the Headset with a DSP (Digital Signal Processor) onboard. A special algorithm in the headset computes the distance between the sound coming from the two mics and cancels out the sound furthest away (i.e. the background noise) so that people can hear you. So the next time you’re at the airport, a noisy coffee shop, or just driving down the road with your window down listening to your favorite tunes remember to wear you’re GL Dual ...