A waterphone is a type of atonal acoustic musical instrument constructed largely of a stainless steel resonator "bowl" with a cylindrical "neck", which may or may not contain a small amount of water, and with brass rods around the rim of the bowl. The waterphone produces a vibrant ethereal type of music.
Several sizes and design variants of the instrument are available. It is generally played in a seated position by a soloist and played by bowing or drumming and movement so as to affect the water inside, and thus the resonant characteristics of the bowl and rods. The waterphone is recognized as a true musical instrument and appears in movie soundtracks, record albums, and is used in live performance.