Instructions

1. Tie the strings to the corners of the coathanger.

2. Hold the string in your hands so the coathanger dangles downward.

3. Gently knock the coathanger on a hard surface - is the sound loud or soft?

4. Wrap your fingers around each string and place your fingers in your ears.

5. Repeat the experiment with your fingers in your ear. Does the sound get louder or softer? Why?

You will need:

- 1 Coathanger

- 2 Pieces of 30cm String