Here’s what you need to know about polygraph tests & voice stress analysis

Through a multitude of technological advancements in the 21st century, there has been a growth in techniques that have been developed to assist in identifying deceit and dishonesty.

Dating back to the early nineties, when polygraph testing was discovered, the sole purpose of this device was to pick up deception, and since its inception, many other great advances have been achieved. Today, there are many supplementary technologies which serve to complement the established research behind the efficacy of polygraph testing.

Understanding what a polygraph test is

This test is carried out using a piece of electronic equipment that is able to measure how a person responds to certain questions. Your blood pressure, level of perspiration and pulse rate are three elements that can be measured while connected to the polygraph testing machine.

Voice stress analysis testing

A voice stress analysis test can be described as being a type of technology used to point out deception based on how your voice reacts and how flexible your vocal chords are when questioned. It must be noted here that anyone being subjected to a voice stress analysis test will feel their throat muscles tighten as a generic response to the situation, which is why only professionals can carry out these tests.

During testing, the way in which your voice changes as you answer questions is measured through using computer software, which will then generate a live report.

Using voice stress analysis tests in conjunction with polygraph testing

These two tests can be used in conjunction as a means to get the most accurate results. Although a subject is hooked up to the polygraph machine, a voice stress analysis test can still be carried out without affecting the polygraph test.

On a technical level, when making use of a polygraph machine the turnaround time for the machine to stabilise ranges between 30 seconds to a minute. This can be considered a slight disadvantage as it prolongs the examination process and might skew the data as the levels of anxiety in the person being examined can increase between the questions.

The convenience of a voice stress analysis test

The voice stress analysis test has a much shorter turnaround time and can reset within three seconds. This results in there being a much shorter waiting period between each question. This test can also be seen as a convenient means of even conducting a test via phone, since there’s no need to connect the person to a machine in order to get results.

Another benefit to this style of testing for deceit is, the test doesn’t need to be done within a specific location. The voice stress analysis test can be conducted within a remote setting. By taking this approach, you’ve got a better chance of obtaining accurate results as the person is within their own comfort zone during the test.

Both the polygraph test and voice stress test have come a long way in recent years. With the continuous developments in technology, both these tests continue to be enhanced and improved.

If you’re looking for a reputable company to assist you with conducting these tests, reach out to the team at King Investigators. All the investigators have an exceptional range of experience and provide the highest quality in service. Contact them today to book your assessment.


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