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The Distribution of Useful Frequencies in Polygraph Sensor Channels

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White B.
European Polygraph
|
2017
|
vol. 11
|
issue 4(42)
161-166
EN
Purpose: to help other polygraph researchers better understand the distribution of energy across diff erent frequencies in the standard six polygraph channels in common use.Th e channels shown will be pneumo, electrodermal (Axciton), cardio cuff pressure, movement sensor, and infrared plethesmo (Axciton). In all cases we use a zero phase high pass filter with a fourth order roll off . Unless otherwise noted, all frequency traces are kept with a constant gain to show their relative energy or strength content.
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