Surgery – Diagnostic testing
Patent
1996-07-01
1998-07-07
Jaworski, Francis
Surgery
Diagnostic testing
340573, A61B 500
Patent
active
057760551
ABSTRACT:
An apparatus and method are described for detecting and measuring the physiologic response of a subject to chemical intake to determine impairment due to alcohol, inhalant, illicit drug or prescription medication. The method includes transducing a set of words spoken by the subject into electrical signals which are amplified and frequency band-limited and then Fast Fourier Transformed to obtain the frequency spectra of the speech. The ratio of speech energy in a first bandpass region with respect to energy in another bandpass region which may include the first region is computed and utilized to produce an output signal which is a measure of the subject's degree of chemical impairment.
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