Sound produced by a stretched wire is due to vibrations. Show by an activity.

Toy telephone works due to sounds produced by vibration of stretched wire. Toy telephone is a basic telephone made out of a long string and two paper or plastic cups. When a person speaks at one of the cups then the vibrations of sound produced by the stretched wire enables the other person to hear his voice successfully. Hence, we can conclude that sound produced by stretched wire is due to vibration.