Acoustic energy, real-time spectrum analyzer

Details Acoustic energy, real-time spectrum analyzer Acoustic energy, real-time spectrum analyzer

1984-01-08

1987-09-08

Pinkham, Richard C.

Education and demonstration

Language

Speech

84464R, 84466, 84DIG9, 381 50, G09B 1500, G09B 1904

Patent

active

046921176

ABSTRACT:
Disclosed is a real-time spectrum analyzer for monitoring acoustic energy, in particular a singer's formant, comprising a microphone element for converting the energy of a singer's voice to an electrical signal, band-pass filters for filtering the signal and selectively passing a portion thereof in a dedicated frequency range of from about 2500 to about 3500 Hz corresponding to singer's formant to a display meter responsive to the portion for visually displaying the magnitude of the total energy of said portion, the band-pass filters being connected in series and tuned to different center frequencies but overlapping from about 20% to about 60% of the total pass-band.

REFERENCES:
patent: 3688010 (1972-08-01), Freeman
patent: 3960043 (1976-06-01), Brand
patent: 3989896 (1976-11-01), Reitboeck
patent: 4024789 (1977-05-01), Humphrey et al.
patent: 4063035 (1977-12-01), Appelman et al.
patent: 4075423 (1978-02-01), Martin et al.
patent: 4211138 (1980-07-01), Deutsch
patent: 4374482 (1983-02-01), Moore et al.
patent: 4401850 (1983-08-01), Harbeson

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