PIRA 3B60.10 Beats: Beat Forks
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Picture shows demonstration used at the University
of Texas at Austin
Instructions / Notes:
- Two tuning forks on resonance boxes are provided with a rubber mallet.
- One of the tuning forks has been altered so its frequency is with 5% of its original frequency.
- This demonstration can be used in conjunction with 3B60.20, but practice is needed.
- If a microphone is used it should placed midway between openings of the two resonance boxes.
- A fork of a different frequency can be used additionally to demonstrate destructive interference.
Demo Staff:
- On top of the altered and unaltered fork, provide an additional fork with a different frequency from the two.
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