Vibrato

[vɪ'brɑːtəʊ] or [vɪ'brɑto]

(noun.) (music) a pulsating effect in an instrumental or vocal tone produced by slight and rapid variations in pitch.

Checker: Truman--From WordNet

n. a pulsating effect in vocal music caused by rapid variation of emphasis on the same tone.

Typed by Elvin