Brazilian scrapers, made of a bamboo tube with transverse notches, which the player scrapes with a small stick.

Source: Art & Architecture Thesaurus

http://vocab.getty.edu/page/aat/300041926

Instrumento musical brasileiro, feito de um tubo de bambu com entalhes transversais, que o músico raspa com uma pequena vareta.

Fonte: AAT

http://vocab.getty.edu/page/aat/300041926