Metallic percussion is a type of musical instrument that produces sound when struck with a mallet or other object. The term 'metallic percussion' is often used to refer to instruments such as gongs, cymbals, and bells. The most common example of a metallic percussion instrument is the GONG, which is a flat metal disc that produces a loud, reverberating sound when struck. Gongs are used in many different musical genres, from classical to rock, and have been used for centuries in religious ceremonies and rituals.