We are currently giving away a $50 Think Geek Voucher to the best gadget suggestion we receive in the next 24 hours, and this early entry is pretty cool the Portable Lie Detector-Voice Stress Unit.

The lie detector works by measuring tension in the voice (the more you lie the tenser you sound).

To train the DeFIBulator to the human voice, ask your subject 3 yes/no questions and then record the voice to establish a baseline. Then ask the real yes/no questions and watch the figure on the screen. DemonochioÕsÓ nose will grow and his horns will appear. The greater the tension in the voice, the longer his nose and horns will be. The DeFIBulator is to be used for amusement only and is guaranteed to be the life of the party.

The Portable Lie Detector-Voice Stress Unit is available from Spy Emporium. Thanks to Kadhal for the suggestion, if you fancy suggesting a cool gadget please let us know and have a change to win $50.