Rattle (percussion)
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A rattle is a percussion instrument. It consists of a hollow body filled with small uniform solid objects, like sand or nuts. Rhythmical shaking of this instrument produces repetitive, rather dry timbre noises. In some kinds of music, a rattle assumes the role of the metronome, as an alternative to the drum.
This instrument was used in the ancient world. Today it plays a role in Cha Cha Cha, tango and jazz.
A rattle is an idiophone.