Zone of Silence

by Erico Guizzo IEEE Spectrum Online, accessed 9 Jun 2005 Limor Fried got the idea when a friend with whom she was eating dinner broke off their conversation to answer her cellphone. Fried got mad. Then she got even, in the way a graduate student at the MIT Media Laboratory, very well might. She built a gadget. She calls it the Wave Bubble because it creates a cellphone-free bubble of silence 4 meters in diameter. It does so by jamming the phones' radio-frequency bands with a junk signal of a few milliwatts. Read the article