In order to understand Vago-sympathetic voice stress analysis, one needs to know that stress, when accompanied by guilt and a known consequence, will cause the body to physically react.

Everyone has experienced stress as related to deception at some point in their life.  Whether being accused as a child with regards to stealing from a department store: questionable Internal Revenue Service filings or perhaps even an Infidelity issue, stress with any consequence of discovery will manifest itself demonstratively.

This stress can be overtly revealed in the form of observable reactions such as sweating, a shaky voice, dry mouth, increased body odor, runny nose, upset stomach, hives or coupled with notable body movements; i.e. body language. This overt response is commonly referred to as the "Fight or Flight Syndrome." The expression of stress however, is also more latent.

Since the Central Nervous System supports the Autonomic (Uncontrollable) branch, these latent emotions of stress will manifest in a recordable way and cannot be controlled.

The Nervous System

The Central Nervous System, brain and spinal cord integrate informational data via a myriad of sensory neurons. One such neuron is the vagus nerve.

The vagus nerve is a remarkable nerve that relates to the function of numerous structures in the body. The vagus nerve supplies nerve fibers to the pharynx (throat), larynx (voice box), trachea (windpipe), lungs, heart, esophagus and most of the intestinal tract (as far as the transverse portion of the colon. And the vagus nerve brings sensory information back from the ear, tongue, pharynx and larynx.

The Parasympathetic and Sympathetic Branches

The Para-Sympathetic branch of our nervous system comes into play under conditions of normalcy or homeostasis, keeping things more in balance. The Sympathetic branch becomes more involved when "Fight or Flight" becomes an issue. Since this will occur in part below our threshold of awareness, even the most accomplished liar will be unable to hide their Psycho-physiological (mind and body) stress reactions provided there is a clear consequence if discovered.

Sensory Input

VIPRE was engineered to capture the changes in an individual's vocal responses based on carefully designed question formatting and direct questions that require an absolute affirmation or denial with regards to the consequence of an event or accusation. When the brain receives and interprets information from the questions asked, this information may or may not produce a higher level of stress, depending on guilt, associated with the consequence of discovery. Once any stressful information is learned, the brain sends a message through neurons to effecter cells, muscle or gland cells which react accordingly in a proportionate reaction. The Vagus Nerve picks up this subtle reaction when stress is present by sending motor impulses to the vocal cords (folds). A trained examiner formulates questions to illicit these responses and VIPRE records the utterance in a sound picture or pattern. These patterns are automatically modulated and serve as a visual review of stress or a lack of stress to the direct questions asked in regards to the issue at hand or case under investigation.


In the past, scientists often refer to lie detection as Psycho-physiological Detection of Deception or PPD. Conversely, stress can be recorded and that fact has been documented in numerous scientific and medical studies. As well, scientific and medical studies are rife with support of the Vagus Nerve and its relationship to the brain, psychological, and the body (nerves), physiological. VIPRE in the hands of a competently trained examiner following the manufacturer's recommended guidelines, will add a powerful tool to the available resources at the operators disposal. This is backed by over thirty years of success in voice stress examination coupled with empirical data and anecdotal reports by countless law enforcement agencies.

Information on this page provided by VIPRE TECHNOLOGY Website:

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© 2021 by ​RICK RAYMOND INVESTIGATIONS - DaytonaLieDetector - The VIPRE VSA can be used to investigate Employee Theft cases which could include cash, checks, or company property. It can also be used to seek out the truth in accusations of Sexual Harassment, False Injuries and or Workers’ Compensation, Disability cases. If your company has a situation you feel might require a lie detector test please contact us for an evaluation to determine if one can be administered.  All  EPPA Rules Apply. Florida Lie Detector exams.  Criminal/Civil Litigation Cases – The VIPRE VSA can be used to verify the facts to support or refute criminal and civil cases. Law enforcement relies heavily on Voice Stress Analysis based systems to clear suspects and identify the guilty in a wide range of crimes from murder, rape, grand theft, robbery, sex offenses. VIPRE VSA Systems are easier to conduct and exams can be conducted in just about any location. Immigration, Marriage Scams, & Human Trafficking – Daytona Lie Detector truth verification polygraph tests can help verify and document immigration claims in the absence of actual documents and other situations. It can assist in seeking out the truth in asylum, residency, and other issues. It can be used to validate legal marriages and or expose marriage scams. It is also helpful in learning the truth from victims of human trafficking cases and violence against women and or children while residing in Florida. Polygraph Exams – If you have failed a polygraph exam we can retest using the VIPRE VSA System.  We can utilize the same questions as the polygraph, or refine or expand them according to your needs. Many people have failed polygraph exams for various reasons and may be seeking a polygraph alternative. The  VIPRE VSA is the polygraph alternative and does not have the INCONCLUSIVE SCORE used by polygraph.  Daytona Beach and Volusia County lie detector exams and voice stress analysis testing.  A properly structured VSA exam configured with the right questions can provide your company or profession the answers you need. Keep in mind that the results of any lie detection-truth verification exam should be ONLY one factor in your total decision making process. VIPRE VSA is just one of the credibility assessment tools used for lie detection - truth verification exams. Cheating spouse lie detector tests. Infidelity lie detector, employee theft polygraph.  Voice Stress Analyzers, Polygraph testing, Lie Detector, Truth Verification in Florida, Volusia County, Brevard County, Daytona Beach, Flagler County, Palm Coast, Cocoa Beach, Ormond Beach, Holly Hill, Ponce Inlet, Port Orange, CVSA.

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