Spectra of amplitude-perturbed glottal waveforms

The spectral description of voice aperiodicities is important for the introduction of refined voice synthesis parameters and for quantifying voice disorders. A quantitative analysis of the spectral properties of glottal pulses contaminated by additive noise and shimmer is given. The results confirm contamination of higher harmonics when additive noise is present and the introduction of sub-harmonics for shimmered pulses.