Describe an activity with a a)a meter scale b)rubber band to show that only a vibrating body produces sound

a.) Keep one part of the meter scale between two bricks and gently vibrate the other side.
b.) Take 2 pins on a soft board and stretch the rubber band over it and then slightly prick the rubber band it is seen that the rubber band vibrates so as to make some sort of sound.
Hence, we can conclude that in the following situations the vibrating body produces a sound. :)