Sound

Abstract

When something vibrates, that is, moves up and down rapidly about a fixed position, sound is generally produced. If someone thumps the top of the table, you can hear the sound produced because the table top is vibrating to and fro. The vibration of a bee’s wings as it flies through the air causes the familiar and ominous buzzing sound. Vibration of the vocal cords produces the sound we know as speech. The crack as a batsman hits the cricket ball is the sound produced by the vibration of the surface layers of the bat. Anything which vibrates tends to cause sound.