Rattles are found in almost every musical culture, in almost every era throughout human history. Technically, they are classified as "idiophones", but that simple label doesn't convey the almost overwhelming variety of materials from which they are made or performance contexts where they are used.
These instruments can
be made from animal horn or hide, leather strips, rope, cloth, wood, nut shells,
gourds, metal, or clay. They can be filled with shell, stone, corn kernels,
beads or other sound-producers; some, like the shekere gourd rattle illustrated
here have beads attached to a net on the outer surface of the instrument. You
can hold them in your hand and shake them or strike them against a hard surface.
They can be tied around your wrists, waist or ankles or attached to other musical
instruments, such as drums or xylophones. There is at least one constant feature
in this incredible diversity of form and use: almost without exception, rattles
accompany dancing as well as vocal music. In English, their very name suggests
movement, articulating the melodic rhythm and adding a shimmering, buzzing sound
quality to the music.
Hear horn rattles used by Seneca singers from Ontario,
Canada Selected references: