Vocal demodulator

Details Vocal demodulator Vocal demodulator

1990-07-13

1992-07-28

Kemeny, Emanuel S.

Electrical audio signal processing systems and devices

One-way audio signal program distribution

Public address system

G10L 500

Patent

active

051346575

ABSTRACT:
Speech analysis apparatus for detection and measurement of low frequency amplitude and frequency modulations, tremor, of the fundamental frequency. A microphone signal of sustained phonation is input to the apparatus which demodulates and measures five parameters digitally displayed; fundamental frequency, amplitude demodulated frequency, amplitude demodulated level, frequency demodulated frequency, and frequency demodulated level. Demodulated outputs are provided for external analysis. A variable cutoff low pass filter maintains cutoff at 1.5 times the fundamental input frequency.

REFERENCES:
patent: 3855416 (1974-12-01), Fuller
patent: 3978287 (1976-08-01), Fletcher

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