Hornbostel - Sachs
Gongs
Individual metal percussion vessels, owing to the solidity and elasticity of their substance, vibrate and radiate sound when struck with non-sonorous objects (hand, stick, striker). The vibration is strongest near the vertex of the struck surface. The player creates clearly defined individual strokes. S. and E. Asia. This group includes the so-called metal drums, or rather kettle-gongs.
(Individual) gongs
Gongs with divided surface
Bossed and flat gongs