http://digbig.com/4kped
Jeremy Arias
"Traditional polygraph favored by many professionals. The computerized voice stress analyzer is a method of lie-detecting used by a growing number of police departments around the nation, despite the lack of substantive research proving its effectiveness. But though many experts have questioned its reliability, University Police have been using it during the hiring process and in criminal investigations for the past three years. The voice stress analyzer detects inaudible changes in a person’s voice to identify whether they are lying. Though it is possible that a person’s voice changes when they lie, there is no substantive proof the machine can effectively monitor whether a person is telling the truth, two experts said."
