What you need:
- A metal clothes hanger
- String
- Scissors
- A spoon
- A friend
What to do:
1. Cut out two lengths of string (about 15 inches each).
2. Lay the hanger flat on a table. Tie one end of each string to one corner of the hanger. Lay the strings out straight too, to ensure that both of them stay equal.
3. Now, loop the free end of each string around your index fingers. The hanger will hang upside down in this case.
4. Ask your friend to hit the hanger with the spoon. What do you hear?
5. Now, undo the loops and put the string, along with your fingers, into your ears. Ask your friend to hit the hanger with the spoon again.
What happens:
The sound of the hanger hitting the spoon is quite loud and different when the string is inside your ear
Why?
An object is said to produce sound’ when it vibrates. These vibrations travel through the medium they are produced in (air, water or solid) and reach our ear. They make our eardrums vibrate thereby allowing us to hear. The vibrations of sound travel better in a denser medium where molecules
Picture Credit : Google
