Simulations of vocal fold vibrations with an analog circuit

The human voice source generates complex signals including subharmonics and toroidal oscillations. Essential features of voice production are covered by two-mass models where each vocal fold is represented by two oscillators. We present a related analog circuit which allows online analysis of the ge nerated complex signals. Using narrow-band spectrograms various bifurcation s due to left-right asymmetry are monitored. Time series, spectra, return m aps, and response measurements provide further detailed information about p hase-locking and toroidal oscillations. Finally, possible clinical applicat ions are discussed.