US Patent 9036855 Rotary user interface for headphones

A headphone includes a housing, a loudspeaker located inside the housing, a cushion coupled to the housing and arranged to acoustically couple the headphone to a user's ear, electronics electrically coupled to the loudspeaker, and a rotatable ring coupled to the housing and surrounding a central portion of the housing, rotation of the ring providing a user input to the electronics. The headphone may include a touch sensor detecting contact with the ring by an external element and providing an input signal to the electronics, the electronics reacting to the input signal based on the direction and extent of contact by the external element moving along the ring.