...show if someone is under stress - it does this by measuring the amplitude of the upper and lower sidebands of the frequencyspectrum of the voice. If the responses are true a green light flashes, but if the person is fibbing the lights go red...
http://www.computerweekly.com/Articles/2002/12/19/191602/xtras-xmas-gadgets.htm
...Mobile working Toolkit Ofcom to auction high-frequencyspectrum Tags: Spectrum, Auction, Conduct...regulator Ofcom is to auction four bands of high-frequencyspectrum which could be used for wireless broadband services...
http://news.zdnet.co.uk/communications/0,1000000085,39291261,00.htm
...TDM) is the digital multiplexing in which two or more apparently simultaneous channels are derived from a given frequencyspectrum, i.e., bit stream, by interleaving pulses representing bits from different channels. Unix (Digital...
http://appscorp.net/glossary.asp