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 ...

you sense that resonance, and feed it back into it to keep it sustaining. With a tuning fork oscillator, the vibration forcing and the feedback are both done via induction, coils act as the bridge ...

Place the rubber mallet and tuning fork on the lectern with the open end of the resonance box facing the audience. Details of the tuning fork can't be seen in a large lecture hall, but the sound can ...