Vibrato used in Noh play was investigated using electroglottographic and acoustical analyses. Laryngeal movements were successfully obtained from the EGG signal and its derivative in order to study how the peculiar and expressive voice qualities were produced during vibrato. The slow wide vibrato of Noh was achieved not only by the F0 modulation but also by changing the degree of constriction at the vocal folds and the supraglottal structures. These complicated movements at the end of the resonator seemed to add color and variety to the voice quality, and produce an extremely unique vibrato.

Index Terms: vibrato, Noh, supraglottal constriction