Violin is a hollow wooden box with rounded ends and a narrow center. There are four strings that extend from the bottom of the body over a raised bridge to the end of the narrow neck called the fingerboard, which is then held by pegs. The body of the violin resonates the vibration produced by drawing the bow across the strings. There are two f-shaped holes near the bridge that lets the panels inside the body vibrate freely. The tone of the violin is often felt to approximate the human voice.