Sympathetic Resonance: mechanical energy is transmitted from one vibrating tuning fork to the other via sound- as revealed by a wood bead on a string. A beautiful example of resonance phenomena where tiny periodic accelerations (such as sound waves) can produce much larger scale accelerations and displacements if the frequency matches the natural frequency (or an overtone) of the structure. This set of tuning forks are manufactured to vibrate at the same frequency and are mounted on resonating c