An individual drum with a tubular body that has a larger diameter at the middle than at the ends. The drum body is rectilinear, with an angular profile. It is enclosed at one end by a single tightly stretched membrane and the opposite end is open. The membrane is directly struck by the player using the hands or intermediate devices such as sticks.
Individual single-skin double-conical drums
Hornbostel - Sachs
Single-skin double-conical drums