Induce vibration on metal ball

Suppose that I person a hollow, metallic shot that lies connected a table.

How do I induce a vibration connected this ball? I want to beryllium capable to power nan frequency, truthful it is simply a forced vibration (not earthy vibration).

I thought of utilizing a SASER but I deliberation those devices are rare.

Maybe a tuning fork could work, but past I tin not power nan frequency, because each tuning fork has only 1 frequency.

Could I usage a periodic electromagnetic beam?