I can say tuning fork.

The some wave has the same frequency as the natural frequency of the tuning fork, the tuning fork is made to vibrate due to a process called resonance.

tuning fork steel instrument in the shape of a U with a short handle. When struck it produces an almost pure tone, retaining its pitch over a long period of time; thus it is a valuable aid in tuning musical instruments.

A tuning fork combined with a quartz sound magnet.

harmonic resonance