Noun
The rapid reiteration of tones without any apparent cessation, so as to produce a tremulous effect.
A certain contrivance in an organ, which causes the notes to sound with rapid pulses or beats, producing a tremulous effect; -- called also tremolant, and tremulant.
Source: Webster's dictionaryHer hair is troublesome and curly ... It falls in long, black strands, but each strand has a gentle, complicated undulation travelling through it, like a mild electric shock or a thrill, hat gives it a life of its own; it is visually analogous to a tremolo on a musical note. Amit Chaudhuri
It's hilarious, because my guitar has what's known as a tremolo bar or a whammy bar. And the whammy bar is probably the most alien thing on my guitar that could possibly relate to a classical guitar. Steve Vai
Addio, del passato bei sogni ridenti features a brief tremolo passage; Ah fors'è lui is in harmonics; and the closing arrangement of Sempre libera features fast scales that suggest a new genre of "coloratura guitar." Source: Internet
An unusual aspect of reggae singing is that many singers use tremolo (volume oscillation) rather than vibrato (pitch oscillation). Source: Internet
A tremolo, or roll (played with two mallets alternately striking on opposing sides of the cymbal) can build in volume from almost inaudible to an overwhelming climax in a satisfyingly smooth manner (as in Humperdink's Mother Goose Suite). Source: Internet
A so-called "vibrato unit" in a guitar amplifier actually produces tremolo, while a " tremolo arm " or "whammy bar" on a guitar produces vibrato. Source: Internet