Acoustic and psychoacoustic aspects of vocal vibrato

Acoustic and psychoacoustic aspects of vocal vibrato Johan sundberg This article reviews research on vocal vibrato and related phenomena. As the vibrato corresponds to a modulation of the fundamental frequency, the primary acoustic attributes are the@equency and amplitude of this modulation as well as its waveform. The range of variation of these parameters in classical operatic singing are discussed as well as the boundaries to similar phenomena such as tremolo and trill. Also considered are some perceptual attributes, such as the effect of the vibrato to glue spectrum partials together to timbrul gestalts, the efect on vowel intelligibility, and the relationship between the frequency modulation and the pitch perceived