Avsapro is simply the worlds most advanced voicestress analysis system. So advanced, that we refer to it as Voice Polygraph. The research papers of Chapman, Stathis and others confirms that modern VSA systems are as reliable as the traditional biofeedback polygraph system.
Avsapro is the only fully automated VSA system. APA validated Question Constructs (templates) and Question Libraries are built in. Cadence between Question Onset and Subject Response is controlled by Avsapro. Homeostasis recovery period is controlled. Avsapro fully integrates with all MS Windows platforms. Filing may be numeric, alpha or alphanumeric, into any directory as selected. Multiple filing and recall options are available. Simplified results reports are produced within seconds. We provide USB-analog headset microphones which match the frequency response of human voice.
Avsapro rotates the CQ/RQ sequence automatically from chart to chart. Users may choose from templates such as IZCT, UTAH, USAFMGQT, REID MGQT and popular screening constructs, or design own templates for research or other. The Crime specific libraries offer up instant questions, which may be easily edited. Tempates may be stored in the program FILES utility, or elsewhere. All files and tests may be stored in Avsapro, a Windows directory, or on removable drives.
Avsapro utilises a neural network database that has been trained with some 6000 known solution voice waves. Scoring is therefore not indiscriminate, but is the result of decades of testing by DOD experts and known solutions. Avsapro is the only VSA system worldwide that utilises AI technology.
For further details please visit http://www.avsapro.com
Various VSA software programs offer a graphic representation derived from that obtained on the Polygraph.
AVSAPRO uses sound recordings made in WAV format, to 11,025 Hz, 8bits.
Voice sounds are filtered by retaining low frequencies. The envelope is not the most interesting feature. Modulation is added in order to bring out the low frequency oscillations.
Some VSA software programs use a theory introduced by the British physiologist Olaf Lippold, 1957, by extracting the low frequency of about 8 to 12 Hz and deducing a value of stress thereon.
Understandably, it’s not too difficult to compute the frequency for the wave displayed in Image 1, but it becomes much more complex for graphs as displayed in image 2.
AVSAPRO software, which is the basis of Diogenes Lantern Pro now uses a new technique for calculating the value of stress, to score voice waves and not one based on direct, manual analysis of the micro-tremor.
AVSAPRO software uses a knowledge base collected from several VSA experts. Approximately 5,000 pre-scored voice signatures are retained in a neural network database.
A totally independent scoring exercise was conducted by VSA experts. At the culmination of the project it was notable that 80% of the results presented only 5% difference on the estimated values of stress, which provides a consistent and reliable basis for the techniques used by AVSAPRO Software.
The technique consists in training a neural network with 5,000 phonemes (utterances) from interrogations. The voice samples are processed to obtain the graphs as per Image 1 and Image 2 above.
These graphs were digitized to provide a basic set for training the neural network. The training of the neural network generates a file of weights that are at the heart of the network processor. Some parameters are used to adjust the neural network ; ie : the number of neurons in input, the threshold, the desired error (1%). The duration of training is approximately 45 minutes on a standard PC.
A fundamental property of the neural network is its capability to produce a reliable result when we enter a voice graph for which it has not been trained. When we submit a graph for which it was not trained, it will produce a result with the specified error (1%). Other external errors may influence the overall error rate. EG: Examiner training and skillset.
AVSAPRO extracts phonemes in real time and digitizes waves. Charts are submitted to the network and thereafter the results are displayed. Another interesting neural network property is that there is no need to calculate complicated mathematical formulas in order to extract frequencies of micro tremors. The neural processor teaches itself how to deduct the outcome on the basis of data provided.
It is totally free from the assumption 11-12Hz for low stress and <8->4HZ for the presence of stress. Our only certainty is the know-how of human experts who have conducted thousands of successful vsa examinations, together with known solution outcomes.
AVSAPRO software can calculate up to 20 estimates of stress per second on a standard PC. Charted tests (validated protocols) are scored within 2 seconds. Exam scores (average of the tests conducted) are displayed instantly at the culmination of the last test chart. AVSAPRO currently provides THREE commercial versions :
AVSAPRO may be used easily and successfully over smart phones. A 1:2 RCA splitter, a RCA flylead + mobile headphone is required.
Both programs feature Autogain to compensate for low input volumes. AVSAPRO is fully compatible with all versions of Microsoft Windows OS.
Versions for Android and Mac are currently under construction.
AVSAPRO’s UNIQUE FEATURES
AVSAPRO 2.0AG & AVSA PRO 1.7KT
AVSAPRO is the most advanced vsa program available worldwide.
AVSAPRO is written by Alpes Software. The only vsa software ever validated was written by Alpes. (Refer AFRL – ROME study )
Both AVSAPRO 1,7KT & 2,0AG are provided with a single licence purchase.
IF IT’S NOT AVSAPRO, IT’S OBSOLETE………………………………………….