The term meaning 'solid' refers to one of the four instrumental classes, the other three being avanaddha, sushira, and tala. Members of the ghana class are technically described as idiophones or autophones as the entire body of the concerned instrument phonates when played. The obvious examples are cymbals, rattles, gongs, and clappers. Instruments such as jhanj, kartal, morchang, and different kinds of bells abound in India. They are mostly employed to create rhythm. Primitive, folk, devotional, and popular categories of music use them in appreciable measure.