Voice pitch detector and display

Details Voice pitch detector and display Voice pitch detector and display

1979-06-13

1981-09-29

Nusbaum, Mark E.

179 1SP, G10L 100

Patent

active

042924693

ABSTRACT:
Voice pitch is detected by passing a speech signal from a microphone 10 through a filter array 20 to a summing amplifier 22. The summing amplifier 22 provides a composite signal of the acoustic components of the speech signal and this composite signal is input to a multiplier 26 and from the multiplier 26 to a multiplier 36 having an output connected to a comparator 42. The comparator 42 compares the output of the multiplier 36 with a hysteresis signal, then provides an output to a phase locked loop 46. The phase locked loop 46 provides a first voltage output in analog form to a bar graph display 50 and provides a square wave output that is applied to a frequency-to-voltage converter 52 for driving a digital display 54.

REFERENCES:
patent: 3215934 (1965-11-01), Sallen
patent: 3327057 (1967-06-01), Coker
patent: 3499991 (1970-03-01), Cassel et al.
patent: 3551588 (1970-12-01), Boworth
patent: 3662374 (1972-05-01), Harrison et al.
patent: 3855417 (1974-12-01), Fuller
patent: 3855418 (1974-12-01), Fuller
patent: 3971034 (1976-07-01), Bell et al.
patent: 3978287 (1976-08-01), Fletcher et al.
patent: 4039754 (1977-08-01), Lokerson
patent: 4063035 (1977-12-01), Appelman et al.
M. Schroeder, "Period Histogram and Product Spectrum etc.", J. Ac. Soc. of Am., vol. 43, No. 4, 1968, pp. 829-834.

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