The kazoo is an American musical instrument that adds a "buzzing" timbral quality to a player's voice when the player vocalizes into it. It is a type of mirliton (which itself is a membranophone), one of a class of instruments which modifies its player's voice by way of a vibrating membrane of goldbeater's skin or material with similar characteristics.
A kazoo player hums, rather than blows, into the bigger and flattened side of the instrument. The oscillating air pressure of the hum makes the kazoo's membrane vibrate. The resulting sound varies in pitch and loudness with the player's humming. Players can produce different sounds by singing specific syllables such as doo, too, who, rrrrr or brrr into the kazoo.
Simple membrane instruments played by vocalizing, such as the onion flute, have existed since at least the 16th century. It is claimed that Alabama Vest, an African-American in Macon, Georgia, invented the kazoo around