Good Vibrations


To examine (hear and feel) sound vibrations!


You will need-

  • A Partner.
  • A balloon.


What you have to do-

  1. Blow up the balloon.
  2. Hold it against your ear.
  3. Ask your partner to press their lips against the balloon and speak.
  4. Repeat steps 3 and 4 but this time you should speak and your friend should listen.


Did you discover what we did?
You can hear the vibrations through the balloon and you can feel them.
You can feel your own voice through your lips as the balloon’s skin vibrates against them.


Sound is created when an object moves and the air around it vibrates creating sound waves.