Bose Noise Cancelling 700 feature a total of eight microphones. Six microphones dramatically cancel noise, so it doesn’t reach your ears. Two of those microphones combine with two others to dramatically improve voice pickup. A beamform array isolates your speech, suppressing everything else that’s audible. A rejection array adds a second line of defence, tracking then blocking the most disruptive remaining sound—from a coffee grinder to other dialogue nearby. It all happens in real time, adapting as you move or your environment changes. It works with any VPA, any phone paired to the 700s or any phone or phone/headphone combination on the far end.