Voice Polygraph/
Voice Stress Analysis


Very few professionals have extensive experience
with BOTH popular types of lie-detection.

I do. Since I also offer the traditional 'wired'
examinations (see,
I know the advantages --and disadvantages--
of both 'wired' polygraph and 'voice' polygraph.

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I like the psychological advantage
of them being secured to a chair with
4 wired connections made to their body
(chest, stomach, left upper arm,
and fingers on right hand).

But these are unnatural attachments, and
there are strict requirements that do not allow
that the slightest movement can be made or the
test is corrupted, which can themselves sometimes
add enough stress to affect the results.

And, because with 'wired' polygraph the
client can only have 3 or 4 relevant questions
(questions about the client's issue or situation)
asked, the exam often leaves more
questions unanswered than answered.

Also, the Internet is full of 'How To Beat A
(wired) Polygraph'
advertisments; known as
'countermeasures', if not caught they can
easily allow a test to be falsely passed.


I like:
--more questions can be asked

--it is so powerful if used secretly
in contract negotiations and other
private discussions to get unfair
advantage that criminal laws now
require written permission to use it

--NOTHING is attached to or
touching the examinee

--developed for United States
Military Intelligence looking for
an alternative to wired polygraph

--insurance companies quietly use it to
screen for suspected false loss claims

--used by the California Highway Patrol,
the Los Angeles County Sheriff Department,
nearly 200 California police agencies,
and nearly 2000 law-enforcement agencies
instead of 'wired' polygraph examinations!

--The voice �micro-tremor� is governed
by the central nervous system
and reacts to the psychological stimuli
(the question) in the same
time frame as does polygraph,
BUT the difference being that with voice,
the �micro-tremor� recovers almost instantly,
while with polygraph
the required recovery time is 25 seconds or
more inbetween questions. The process is
therefore far more user-friendly as there is
no artificial waiting
time between question sets.

--For some special situations where privacy can
assist with embarassment or security issues, testing
can be done with equal accuracy over the phone.

--NO 'countermeasures'
(no way to 'trick' or 'beat' this technology!)

Voice lie detection, following a paralinguistic
pre-test interview, is very accurate.
The figures most often cited are
in the 95% - 98% range.

Used successfully by US military troops
on terrorists in war zones in combat
situations in Iraq and in Afganistan.

Accordingly, this technology is rapidly replacing
the polygraph at many law enforcement agencies.
There are several independent and unbiased
studies conducted regarding the accuracy
of voice stress analysis. Each of them show
the high accuracy of the voice lie detection.

Following the 9/11 attack on America,
Congress provided President Bush with
The Airport Security Federalization Act of 2001,
which he signed into law.
This includes the provision that airports will
�provide for the use of Voice Stress Analysis
or other technologies to prevent a person who
might pose a danger to air safety from boarding
the aircraft��. Congress and this provision further
legitimized the use of voice stress analysis as
a means of truth verification.

No other type of lie-detection has
received such a strong endorsement.

Comparing the two types of lie-detection:
Some have compared wired polygraph as being
like old-fashioned wired telephone
lines and Voice Lie Detection as being
like modern digital telephone service.

Many states have enacted legislation
regulating the use of voice lie detection
on persons without their express consent
in advance, yet even further endorsing the
validity of voice lie detection.

- - - - - -

More importantly:
I have conducted BOTH exam types at the
SAME time on the SAME person many times;
the final outcome (Pass or Fail)
matched on each every time.

The wired polygraph industry does
not like voice-based lie-detection;
the voice polygraph industry does
not like wired-based lie-detection.
Some call it the 'Toyota and Nissan' comparison:
both do their job, similar yet different.

Each side will try to 'sell' theirs as
being the best and the other as less.
Each will cite 'studies' and 'statistics':
some are accurate, some are self-serving.

I know both and perform both;
I am certified for both.

Only someone experienced with
both and who offers both can give
an accurate & unbiased opinion.

�1988-2010 and

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