This is the Cell Phone Disco by Informationlab at NextFest '07, it's basically a large wall covered in LED's. These LED's only turn on when in the presence of the same electromagnetic interference (EMI) that comes from a cellphone. So when you use your cellphone in the presence of the Disco you can "see" the EMI noise emanating from your phone. [Product Page via NextFest]
'Cell Phone Disco' Boogies Into NextFest
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