©copyright Raimo Olavi Toivonen 1983−2019. All rights reserved. Last updated on August 8, 2019.

Home  Signal displays 1985−  Multi-envelope displays 1998−  FFT displays 1985−  Cepstrum displays 1983−  LPC displays 1992−  Auditory displays 1983− Loudness displays 1995−  Loudness curves 1998−  Timbre spectrum 1983−  LTAS displays 1992−  Harmonic FFT displays, S/N ratio 1989−  F0 displays 1983−  F0 histograms in semitone scale 1989−  Computer Voice Fields in semitone scale 2017−   Fonetograms in semitone scale 2017− Jitter/shimmer 1990−  Waterfall displays 1983−  FFT spectrogram displays 1985−  LPC spectrogram displays 1998−  Auditory spectrogram displays 1985−  Formant charts in Bark, ERB, mel, semitone and Hz scales 1988−  Bark scale 1983−  ERB scale 1996−  Semitone scale 1989−  Sone scale 1995−   Other links  Formant charts of world languages in Bark scale 2018–

Works 1972−

ISA software

Computer Voice Fields™ (CVF) in dB/Hz scale on Intelligent Speech Analyzer ™ (ISA)

Google Scholar "Computer Voice Fields"  11 results.

Google "Computer Voice Fields"  182 results.

Google "Computer Voice Fields" "fonetogram"  103 results.

Google Images "phonetogram"  16.500 results.

Google Images "fonetogram"  3.550 results.

Psychoacoustic links to "en.wikipedia.org/wiki":  Psychoacoustics   Auditory   Auditive   Auditory phonetics   Auditory system anatomy   Sone scale   Phon scale   Loudness   Equal-loudness contours   Fletcher–Munson curves   Bark scale   Critical bands   Auditory Filters   ERB scale (Equivalent rectangular bandwidth)   Mel scale   Semitone scale   Hertz scale   Sound pressure   SPL (Sound pressure level)   Stevens's power law   Stanley Smith Stevens   Harvey Fletcher   Karl Eberhard Zwicker

My F0 analysis is done by bandpass filtering the time signal and then searching every voice period in the time signal using my unique method. By searching in the time signal, each voice period can be determined with high accuracy F0, and even small variations in the fundamental frequency can be seen.

My unique F0 algorithm also makes it possible to determine the jitter and the shimmer.

My F0 algorithm has been in use for 34 years since 1984 and has been running in real time on the NEC's uPD7720 signal processor since 1985, 33 years ago.

Analysis of images I have from the very beginning coded Neon object-oriented programming language.

Who else would have done pitch analysis in Finland already on 1984, 34 years ago, and already on 1985 in real time?

My F0 analysis I have coded as a DSP man totally from zero to machine languages.

 

Computer Voice Field ™ (CVF) measured by prof. Aatto Sonninen on 1984. The voice field shows each identified F0 period separately.

Computer Voice Field ™ (CVF) with ISA measured by prof. Aatto Sonninen on 1987. The voice field shows each identified F0 period separately.

Computer Voice Field ™ (CVF) with ISA measured by prof. Aatto Sonninen on 1987. The voice field shows each identified F0 period separately. The picture also shows the slope of the sound field.