An agogô (meaning bell) is a single or a multiple bell now used throughout the world but with origins in traditional Yoruba music and also in the samba baterias (percussion ensembles). The agogô may be the oldest samba instrument and was based on West African Yoruba single or double bells. The agogô has the highest pitch of any of the bateria instruments.
On the construction, each bell is a different size. This allows a differently pitched note to be produced depending on which bell has been hit. Originally wrought iron, they are now manufactured in a variety of metals and sizes for different sound qualities. The most common arrangement is two bells attached by a U shaped piece of metal. The smaller bell is held uppermost. Either bell may be hit with a wooden stick to make a cowbell like sound or less commonly a clicking sound is produced by squeezing the two bells together.