Apparatus for speech pattern derivation

Details Apparatus for speech pattern derivation Apparatus for speech pattern derivation

1978-01-04

1979-02-13

Claffy, Kathleen H.

Surgery

Truss

Pad

179 1SC, 179 1SP, 128 21Z, G10L 112, G09B 1904

Patent

active

041397320

ABSTRACT:
The invention relates to the monitoring, recording and display of a speaker's larynx waveform, for the purposes of education, speech therapy and speech analysis. A pair of electrodes are applied externally to the larynx region of the speaker's neck. Each electrode has two concentric surfaces (the outer surface is called a guard ring). One electrode feeds a carrier voltage to the speaker's neck. The other electrode receives the resultant larynx amplitude-modulated current. Detection techniques are used to derive the larynx waveform. A preferred detection technique is "slicing" which is herein defined as a demodulation which follows the changes in envelope of an amplitude-modulated carrier and retains only the small rapid larynx modulation filtering out the slower neck-movement modulation. The important feature of speech called intonation, which is made up of rhythm and pitch patterns, is directly correlated with larynx frequency. The present larynx waveform provides a simple and reliable basis both for the representation of intonation in speech and for the analysis of the frequencies defining other speech pattern features. Any combination of these patterns is displayed, on a domestic television receiver, for instance, and, or plotted or recorded.

REFERENCES:
patent: 3587562 (1968-02-01), Williams
patent: 3677261 (1972-07-01), Day
patent: 3871359 (1975-03-01), Pacella
Von Hippel, "Dielectric Materials", MIT Press, 1954, pp. 48, 50, 54, 57.
E. Nassimbene, "Speech Analyzing Circuitry", IBM Tech. Discl. Bull., Dec. 1963, p. 26.

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