http://digbig.com/4hqah
"More than 50 Wisconsin law enforcement agencies have begun to rely on a voice analysis system as an investigative tool to detect lies, while other agencies argue the analyzer is no more accurate than a coin flip. The system works by measuring tremors and stress through voice vibrations. Advocates say the analyzer is a cheaper, faster alternative to the polygraph, which records blood pressure, breathing and sweat. But opponents say the technology is unproven and reliable."
