2) Four microphones for noise canceling circuit input.
3) "Bone conduction" sensor for talk mic; combines with exterior mics (2).
4) Vibration detector to sense when off head for pause.
5) NFC sensor for quick pairing to other devices.
6) Rechargeable battery.
The Parrot Zik is an unbelievably complex headphone. It includes four microphones (2 inward facing, and two outward facing) which are used for noise canceling. The two outside mics do double duty in noise canceling and as mics for…