Drum

The drum is a member of the percussion group, technically classified as a membranophone.. Drums consist of at least one membrane, called a drumhead or drum skin, that is stretched over a shell and struck, either directly with parts of a player's body, or with some sort of implement such as a drumstick, to produce sound. Other techniques have been used to cause drums to make sound, such as the "Thumb roll". Drums are the world's oldest and most ubiquitous musical instruments, and the basic... full article at wikipedia