Sound is a form of energy which causes sensation of hearing. Sound is produced by vibrating bodies. When a bell is struck with a metallic rod, it produces sound. We can sense the vibrations of the bell while it is producing sound by touching it. We can even observe that the sound ceases when the bell stops vibrating. Experiment to verify that vibrating bodies produce sound Experimental arrangement to show that vibrating bodies produce sound Consideration a tuning fork fixed to a rigid support as shown in Fig. 2. A pith ball suspended from a support is held close to one of the prongs of the tuning fork. When the fork is excited with a rubber hammer and if the pith ball is in contact with the fork, we observe that the ball is flicked away by the fork, indicating that the tuning fork which is producing sound is vibrating and the pith ball is flicked away by the vibrations of the fork. From this we may conclude that sound is produced by vibrating bodies. When we speak...