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An Introduction to the Physiology of Speech Production for Law Enforcement Professionals

An Introduction to the Physiology of Speech Production for Law Enforcement Professionals

by admin | May 31, 2017 | Science

As a law enforcement agent, you’ve likely heard about the growing popularity of the Computer Voice Stress Analyzer (CVSA®). Perhaps you’ve read case studies about some of the challenging investigations CVSA has helped solve. Maybe you’ve heard success stories from...
Understanding the Physiological Tremor: How Stress Affects the Autonomic Nervous System

Understanding the Physiological Tremor: How Stress Affects the Autonomic Nervous System

by admin | May 17, 2017 | Science

While law enforcement agencies around the country are adopting Computerized Voice Stress Analysis (CVSA) technology, there remains some skepticism within the community about its reliability. But if you understand the science behind the system, you will realize that...
A Scientific Comparison of the CVSA Versus Alternative Truth Verification Methods

A Scientific Comparison of the CVSA Versus Alternative Truth Verification Methods

by admin | May 11, 2017 | Science

Scientists have developed multiple techniques to detect deception, but it’s important for law enforcement to understand that not all truth verification methods are created equal. Compared to handwriting analysis, the polygraph, and body language or behavioral...
Reading a CVSA Chart: How Voice Frequencies Translate to the Page

Reading a CVSA Chart: How Voice Frequencies Translate to the Page

by admin | May 8, 2017 | Science

Recent advances in law enforcement technology abound, which can sometimes make officers wary about whether these innovations really work. One newer technological advancement is the Computer Voice Stress Analyzer (CVSA), which makes it possible to identify signs of...
A Guide to Using CVSA Block Scores to Detect Inaudible Voice Stress

A Guide to Using CVSA Block Scores to Detect Inaudible Voice Stress

by admin | May 4, 2017 | Science

You’re in the thick of it—sitting in a small, quiet interview room, examining a suspect in a tough case. Every question is answered with incredible ease, but you worry there is something beneath the surface you aren’t quite able to reach. Are you being deceived? After...
The Science Behind the CVSA: Olof Lippold and the Discovery of Microtremors in the Human Voice

The Science Behind the CVSA: Olof Lippold and the Discovery of Microtremors in the Human Voice

by admin | Apr 28, 2017 | Science

Scientists are constantly re-inventing the wheel and building upon and adapting other people’s discoveries. When we unbox that new piece of technology, we are just excited to see it work, but knowing how it works and how it evolved to this version can help us...
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