Architect Ursula Laveren and information designer Auke Touwslager teamed up to create ‘Cell Phone Disco’ an interactive surface that visualizes the electromagnetic field emitting from mobile phones through light. The installation responds to the activity of the mobile phone, illuminating thousands of tiny lights on its surface when a call is in progress. The project essential turns one frequency range, electromagnetic field of the phone, into another, the range of visible light. The project also manages to show mobile users their phone’s presence beyond the physical object.