Title: Physiological response analysis method and apparatus

Abstract: A method of detecting psychological stress by evaluating manifestations of physiological change in the human voice wherein the utterances of a subject under examination are transduced to electrical signals and processed to emphasize selected characteristics which have been found to change with psycho-physiological state changes. The processed signals are then displayed, as on a strip chart recorder, for observation, comparison and analysis. An especially useful characteristic is an infrasonic modulation in the voice. Apparatus for performing detection of this type includes a transducer, a magnetic recorder, a series diode, a plurality of integrating capacitors, an amplifier and a chart recorder. A second apparatus includes filter means, an FM discriminator and a detector, a waveform integrator, an amplifier and a recorder for producing a visible record.

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Inventors: Bell, Jr., Allan D. (Annandale, VA, US)
Ford, Wilson H. (Arlington, VA, US)
McQuiston, Charles R. (Falls Church, VA, US)

Application Number: 286426
Filing Date: 1972-09-05
Publication_date: 1976-07-20
Assignee: Dektor Counterintelligence and Security, Inc. (Springfield, VA)
Primary Class(es): 346/33R 324/76.13, 346/13, 600/300
Other Classes:
US Patent Ref:

2181265	Nov, 1939	Dudley	179/100.
3195533	Jul, 1965	Fisher	128/2.
3221334	Nov, 1965	Jones	346/33.

Other Refs:
Primary Examiner: Hartary, Joseph W.
Assistant Examiner:
Attorney: Roylance, Abrams, Berdo & Kaul