What vibrating substance produces sound

he strands of the rubber band, also the prongs of the tuning fork, were moving back and forth rapidly while they were producing sound. This back and forth motion of a substance is called vibration.

When a substance is producing sound, it is vibrating. The strings of a violin are set in vibration by means of a bow. A reed in the mouthpiece of a saxophone is set in vibration by a player’s breath. The sounds made by wind instruments like the pipe organ are produced by vibrating columns of air. Any sound, no matter how it is produced, is caused by a vibrating substance.