Hornbostel - Sachs
Suspension rattles
The substance of the instrument itself, owing to its solidity and elasticity, vibrates and radiates sound when struck. Percussion results indirectly through a shaking movement executed by the player. Rattling objects are strung in rows on a cord. The intention is to yield clusters of sounds or noises, and not to let individual strokes be perceived. Necklaces with rows of shells.
Strung rattles