Construction
A friction drum is a percussion instrument consisting of a single membrane stretched over a sound box, whose sound is produced by the player causing the membrane to vibrate by friction. The sound box may be a pot or jug or some open-ended hollow object. To produce the friction, the membrane may be directly rubbed with the fingers or through the use of a cloth, or a stick or cord which is attached to the centre of the membrane and then rubbed or moved with a hand, sponge or cloth, generally wet. The membrane may be depressed with the thumb while playing to vary the pitch. When a cord is used the instrument may be referred to as a "string drum" or "lion’s roar". In some friction drums, the friction is obtained by spinning the drum around a pivot.
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