SUMMARY DRAFT Synthesis of disordered voices

Abstract. This presentation concerns the simulation of disordered voices. The synthesis is based on shaping functions, which are nonlinear memoryless input-output characteristics that transform a trigonometric driving function into a synthetic phonatory excitation signal. One advantage of the shaping fuction model is that the instantaneous frequency and the spectral balance of the phonatory excitation signal are controlled by two separate parameters. It is shown how to synthesize different types of dysperiodicities by modulating both the amplitude and instantaneous frequency of the driving function. The voice disorders that are simulated are short- and long-term perturbations of the vocal frequency, biphonation, diplophonia and raucity. Turbulence noise is modeled by additive white noise.