Hornbostel - Sachs
Percussion vessels
Wooden percussion vessels, owing to the solidity and elasticity of their substance, vibrate and radiate sound when struck with non-sonorous objects (hand, stick, striker) or against non-sonorous objects. The instruments have a wide longitudinal mouth. The player creates clearly defined individual strokes on the external surface of the instrument. Some forms of 'slit drum' such as Fijian lali where the whole 'mouth' is open.
Percussion troughs