3B70.10 Coupled Tuning Forks
A tuning fork (mounted on a resonance box) is made to resonate when a second identical tuning fork is rung nearby. This is beacause the first tuning fork's driving frequncy is the same as the second tuning fork's natural frequency.
-  Identical tuning forks mounted on resonance boxes
-  Rubber mallet
- Place the rubber mallet and tuning forks on the lectern with the open ends of the resonance boxes facing each other.
- Details of the tuning forks can't be seen in a large lecture hall, but the sound can be clearly heard.
- Place the tuning forks so the openings of the resonance boxes are a few inches apart.
- Hit one tuning fork with the rubber mallet.
- Damp the same tuning fork by holding onto the tines. Note that the second tuning fork (which was not hit) is rining.
- PIRA 3B70.10
If you have any questions about the demos or notes you would like to add to this page, contact Ricky Chu at ricky_chu AT sfu DOT ca.