Simulation of tremulous voices using a biomechanical model

Abstract

Vocal tremor has been simulated using a high-dimensional discrete vocal fold model. Specifically, respiratory, phonatory, and articulatory tremors have been modeled as instabilities in six parameters of the model. Reported results are consistent with previous knowledge in that respiratory tremor mainly causes amplitude modulation of the voice signal while laryngeal tremor causes both amplitude and frequency modulation. In turn, articulatory tremor is commonly assumed to produce only amplitude modulations but the simulation results indicate that it also produces a high-frequency modulation of the output signal. Furthermore, articulatory tremor affects the frequency response of the vocal tract and it might thus be detected by analyzing the spectral envelope of the acoustic signal.

Voice Signals Produced With Jitter Through a Stochastic One-mass Mechanical Model

“…Shinji Deguchi and Juki Kawahara [23] present a continuum-based numerical model of phonation to simulate human phonation with vocal nodules. Fraile et al [24] simulate vocal tremor using a high-dimensional discrete vocal fold model. However, all of these models are deterministic.…”

Jitter generation in voice signals produced by a two-mass stochastic mechanical model

“…Deguchi and Kawahara (2011) have simulate human phonation with vocal nodules. Fraile et al (2015) simulate vocal tremor using a high-dimensional discrete vocal fold model. However, all of these models are deterministic.…”