Thinktechno.com

The Spion portable voice lie detector, an elegant looking device though not 100% accurate will tell you whether a person is telling the truth or not. The portable device utilizes voice tension technology to measure varying degrees of vibration in the voice. These vibrations are caused by the user going from a state of calm, to being a little nervous as you would when you lie.

Even an F.B.I. polygraph isn’t 100% accurate but after a testing, the Voice Lie Detector was shown to have a very high accuracy rate.All you need to do is ask the Spion device three yes or no questions to record the voice and “establish a baseline”. Once you have that, you can have the suspect on his or her lies. 

Via Coolest Gadgets

Pushkar