Acoustic demonstration of beats https://www.youtube.com/watch?v=IYeV2Wq82fw
This is not mentioned in the video but beats also arise and persist in a driven oscillator when no damping force is present. This happens because the driver`s frequency does not match the natural frequency of the oscillator. Beats will also initially appear in a driven oscillator when a damping force is present but they will fade away quickly. Harry
