The Global Gen World

Voice Stress Analysis is a technology that uses voice-based testing to come up with a conclusion. It is based on the basic principle that the human voice contains telltale signs that will betray its speaker’s emotional state like the intent to deceive. Small and often inaudible changes in the voice occur and are visually displayed on a computer screen. It not only seeks to recognize veracity but also a range of other emotions that can be of use in a broader screening process. The lie-detector has increasingly used voice stress analysis as its software continues to be refined.

Suspects are asked several controlled questions to gauge normal vocal response levels. The real questioning that follows would reveal the computer’s interpretation of the responses immediately.