LVA6.50 - Technology
Nemesysco's LVA is a security level voice analysis technology, adapted to meet the needs and expected emotional scenarios encountered in security use, such as formal police investigations, security clearances, secured area access control, intelligence source questioning, hostage negotiation, and more.
LVA technology enables a better understanding of your subject’s mental state and emotional makeup during the time in which he or she is speaking. The technology identifies various types of stress, cognitive processes, and emotional reactions. This information provides insights into the way the person thinks; what troubles him; what excites him; what portions of his response he is uncertain about; what topics require more of his attention, and what areas appear to be sensitive issues for the speaker. In addition, LVA enables you to explore several levels of conscious and unconscious thoughts and feelings. This exploration can reveal additional layers of information that would otherwise not be available. Together, these processes allow you to save crucial time while getting closer to the underlying truth.
LVA is not a "voice stress analysis" technology, nor does it use any previously known method for detecting voice stress like "micro-tremors".
LVA uses a patented and unique technology to detect “traces” of brain activity using the voice as a medium. The technology is based on the idea that changes in cortical perception and interpretation of events manifest themselves in the vocal waveform during speech. By utilizing a wide range spectrum analysis to detect minute, involuntary changes in the speech waveform, LVA can detect anomalies in brain activity and classify them in terms of stress, excitement, deception, and varying emotional states, accordingly. Stress (“fight or flight” paradigm) is only one component of the overall emotional structure that is detected
LVA and Lie Detection
Professionals in the field of lie detection know that there is no such thing as a “real” lie detector, because lying is not associated with a single unified set of feelings that can be measured. Lying is a result of a deep logical process that has a particular intention behind it. People will lie to protect themselves from harm, while others will lie to gain profit, or even just to make a joke. Due to the various reasons for lying, it is difficult to ascertain a fixed set of characteristics (physiological or psychological) that differentiate lies from truth. However, LVA is capable of detecting the intention behind the spoken words. Detecting the intention allows you to identify and reveal the lie itself. This unique functionality brings LVA as close as possible to a ”true” lie detector, although it is actually an emotion identifier used for lie detection purposes.
Security use vs. Personal use
Security users need a tool that will provide them with just the right amount of information needed for the case in question. Any non-relevant data can obscure what is essential. LVA technology allows you to identify relevant pieces of information quickly, and provides critical data regarding risk of deception. This allows you to focus investigation time on potential leads and reduce the time spent on non-essential or irrelevant data.
While Nemesysco’s personal-use products provide more generalized data, LVA has a dynamic range of sensitivities that enable you to zero-in on those emotional indicators that are absolutely relevant. In addition, LVA is equipped with tools that allow you to explore a flagged piece of information more thoroughly. LVA technology can be utilized both in real-time (for general overview of any subject/case/suspect/witness), and in offline mode (for more in-depth exploration), using recorded data from any source. The technology can also be utilized as a “voice polygraph” for the analysis of a series of yes/no questions presented in the traditional polygraph format.
LVA Analysis Process
LVA has two basic formulas comprised of unique signal processing algorithms that extract more than 120 emotional parameters from each voice segment. These are further classified into nine major categories of basic emotions. Depending on the goal of the analysis, up to eight “final analysis” formulas can be applied to the emotional parameter data. These include: Lie stress analysis, Arousal level, Attention level, Emotional level, Conflict level, Deception patterns match, and additional methods for veracity assessment
The Human Speaking Mechanism
The human speaking mechanism is one of the most complicated procedures the human body is capable of, due to the number of muscles and physical apparatus involved, and the ways in which they need to be synchronized in perfect timing.
Initially, the brain apprehends a given situation and the possible implications of whatever will be said. Then when a person decides to speak, air is pushed upward from the lungs into the vocal cords. This causes the vocal cords to vibrate at a specific frequency and produce sound. The vibrated air continues to flow up toward the mouth where it is manipulated by the tongue, teeth and lips to produce sound streams which we interpret as words or phrases.
The brain closely monitors all of these procedures, ensuring that the sound emitted is what was intended, is intelligible, and is at a volume that can be heard by the intended listener.
Due to this constant cerebral monitoring, every "event" that passes through the brain will leave a trace on the speech flow. LVA technology ignores what your subject is saying (i.e., the specific content) and focuses only on changes in brain activity that are reflected in the voice. In other words, what is critical is not “what” your subject is saying, but “how” he or she says it.
LVA products
LVA technology is currently utilized in all of Nemesysco’s security products. These include: LVA 6.50, TiPi 6.40, GK1 and SCA1.
Learn about LVA modes of operation