Patent US3855417A successfully refreshed from Google Patents.
US3855417A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for phonation analysis lending to valid truth/lie decisions by spectral energy region comparison
Assignee: Individual
•
Filing: 1972-12-01
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Granted: 1974-12-17
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Expires: 1992-12-01
Abstract
Abstract A method and apparatus for indicating emotional stress in speech by normalizing the ratio of peak amplitude signals in two or more frequency regions of a single response. Normalization is achieved by comparing all subsequent ratios with a selected stored ratio of the same speaker.
Inventors
- 👤 F Fuller
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 09:53
CPC Classifications
G; G10; G10L; G10L17/00; G10L17/26
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
88 words
A method for detecting emotional stress in the utterance of an individual comprising: converting said utterance to an electrical signal; selecting two different frequency bands of said electrical signal; detecting and holding the peak amplitude of each frequency band for the duration of the utterance; computinG the ratio of the held peak amplitude of one frequency band with the other; storing a previously computed ratio of said peak amplitudes; comparing subsequent ratios with said stored ratios; and displaying the compared results which would be indicative of emotional stress.
Claim 2
Independent Claim
88 words
A method for detecting emotional stress in the utterance of an individual comprising: converting said utterance to an electrical signal; selecting two different frequency bands of said electrical signal; detecting and holding the peak amplitude of each frequency band for the duration of the utterance; computinG the ratio of the held peak amplitude of one frequency band with the other; storing a previously computed ratio of said peak amplitudes; comparing subsequent ratios with said stored ratios; and displaying the compared results which would be indicative of emotional stress.
Claim 3
Dependent Claim
28 words
A method as in claim 1 wherein selecting comprises amplifying, band-pass filtering, rectifying and smoothing wherein said band-pass filtering and smoothing is different for each selected frequency band.
Claim 4
Dependent Claim
15 words
A method as in claim 1 wherein displaying comprises indicating quantitatively stress, non-stress and indecision.
Claim 5
Independent Claim
153 words
A device for indicating emotional stress from the utterances of a human comprising: means for converting said utterances into electrical signals; first channel means connected to said converting means for detecting and holding a peak amplitude in a first frequency band for the duration of the utterance; second channel means connected to said converting means for detecting and holding a peak amplitude in a second frequency band for the duration of the utterance; first ratio means connected to said first and second channel means for taking the ratio of said detected and held peak amplitudes means connected to said first ratio means for storing a previous ratio taken by said first ratio means second ratio means connected to said first ratio means and said storing means for taking the ratio of said stored ratio and subsequent detected peak amplitude ratios; and means connected to said second ratio means to display said second ratio.
Claim 6
Independent Claim
153 words
A device for indicating emotional stress from the utterances of a human comprising: means for converting said utterances into electrical signals; first channel means connected to said converting means for detecting and holding a peak amplitude in a first frequency band for the duration of the utterance; second channel means connected to said converting means for detecting and holding a peak amplitude in a second frequency band for the duration of the utterance; first ratio means connected to said first and second channel means for taking the ratio of said detected and held peak amplitudes means connected to said first ratio means for storing a previous ratio taken by said first ratio means second ratio means connected to said first ratio means and said storing means for taking the ratio of said stored ratio and subsequent detected peak amplitude ratios; and means connected to said second ratio means to display said second ratio.
Claim 7
Dependent Claim
64 words
A device as in claim 4, said first and second channel means each including: means for passing electrical signals in a selected frequency band; means connected to said passing means for rectifying said passed signal; means connected to said rectifying means for smoothing said rectified signal; and means connected to said smoothing means for detecting and holding the peak amplitude of said smoothed signal.
Claim 8
Dependent Claim
24 words
A device as in claim 5 wherein said first channel passes a frequency of 150-300Hz and said second channel passes a frequency of 600-1200Hz.
Claim 9
Dependent Claim
32 words
A device as in claim 4 wherein said display means comprises three indicators each responsive to a select region of second ratio values thereby indicating stress, non-stress and indecision in the utterance.
Claim 10
Dependent Claim
39 words
A device as in claim 4 wherein said first channel''s frequency band is of a lower frequency than said second channel''s frequency band, and wherein said first channel''s detected peak amplitude comprises the denominator of said first ratio means.
Claim 11
Dependent Claim
32 words
A device as in claim 4 wherein said stored ratio comprises the denominator of said second ratio means and said subsequent peak amplitude ratios comprises the numerators of said second ratio means.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-12-16 | 1978-06-17 | 1978-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-12-16 | 1982-06-17 | 1982-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-12-16 | 1986-06-17 | 1986-12-17 | $7700.00 | Window Closed / Lapsed |