If you are watching the Football World cup on the television you may be hearing a buzzing sound and you turn the volume down of your TV. The sound is of a stadium horn which is played in chorus by South African spectators. It is called Vuvuzela and it is from South Africa.

The vuvuzela  sometimes called a "lepatata" (its Tswana name) or a stadium horn, is a blowing horn up to approximately 1 m (3 ft 3 in) in length. It is commonly blown by fans at football matches in South Africa.

The instrument is played using a simple brass instrument technique of blowing through compressed lips to create a buzz, and emits (from the standard shorter horn of about 60–65 cm) a loud monotone . A similar instrument (known as corneta in Brazil and other Latin American countries) is used by football fans in South America.