
It is a member of the membranophone family of musical instruments: a frame or shell (in the djembe's case it is a wood shell) covered by a membrane ordrumhead made of rawhide or some other material. Djembes are commonly about 12" (30 cm) in diameter and 24" (60 cm) in height, varying a few inches. They can also be found in many smaller sizes, from 5" (13 cm) to 18" (46 cm) in diameter. As a result of the goblet shape, the density of the wood, the internal carvings, and the skin, there is a wide range of tones that can be produced by the djembe. The rounded shape with the extended tube of the djembe body forms a device known in physics as a Helmholtz resonator, giving it its deep bass note. The primary notes are generally referred to as "bass", "tone", and "slap", though a variety of other tones can also be produced by advanced players. The slap has a high and sharp sound, the tone is more round and full, and the bass is low and deep.
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