Resonance of a cantilever

Today we could complete the set-up for this experiment. We used a plastic stick and bicycle wheel spoke as a cantilever beam.
A plastic disposable cup is attached at the center of a loudspeaker using  adhesive ( which can be removed easily). Then the cantilever beams are fixed on the top of  the cup using cello tape.

The speaker is connected to SQR1 and the frequency is gradually changed. when the frequency matches with the natural frequency of the beam it starts vibrating with large amplitude.

The variation of resonance frequency with length can be investigated by cutting sections off the end of the plastic stick.

This is the setup we used….