Purpose
A tuning fork mounted on a box (one end closed) causes box to resonant at the frequency of the fork.

Description
- Using two tuning forks (of the same frequency), each mounted on their respective box, (box openings facing each other) strike one of the forks. If you stop that fork after a few seconds, you will hear the same tone coming from the other fork, set into vibration by the first one.

Equipment
Tuning forks mounted on boxes, rubber mallet