Beats with tuning forks on tuned cavities.

Beats with Tuning Forks. Both Tuning Forks (mounted on sounding boxes) are rated at the same frequency. One fork is slightly de-tuned with a rubber band or metal clip. Both forks are struck, and beats result. NOTE: If you want the Oscilloscope display,please request it specifically
UCB Index: 
B+35+20
PIRA Index: 
3B60.10
Demo Diagram: 

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