- Ferdinand J. de Hen
End-blown whistle of the Boa people of the Democratic Republic of the Congo. Related names for similar instruments are gwinza (Bati), bwanze (Makere), and mwanzi (Zande). The mbenza is made of wood, about 40 cm long, and has a slender conical or cylindrical bore with no fingerholes.F.J. de Hen...