Sound & Hearing

Resonant Rings

Circular steel bands of various diameters are mounted on a plate which has been cemented to a loudspeaker. By adjusting the frequency of the speaker, a graphic illustration of harmonic resonance can be seen in the rings as they vibrate at various frequencies and in different modes of vibration. The frequency of the speaker can be read directly on a digital counter. Exciter levers are provided for two of the rings so they may be struck lightly and their natural frequency "observed."