Hornbostel - Sachs
Tubular drums
Drums with tubular bodies that have a larger diameter at the middle than at the ends. The drum bodies are rectilinear, with an angular profile. Tightly stretched membranes enclose one or both ends, and are directly struck by the player using the hands or intermediate devices such as sticks. India (mrdanga, pakhavaja).
Double-conical drums
Single-skin double-conical drums
Double-skin double-conical drums