Another investigation of the driven harmonic oscillator, showing the measured oscillator amplitude as a function of drive frequency, on a log-log plot.  These data were taken by computer using LabVIEW to control the signal generator frequency and to measure the oscillation amplitude (using the MMHO photodiode signal). The inset shows the same data near resonance on a linear-linear plot. The Lorentzian approximation is no longer adequate over this extended frequency range, so the fit function is the full theoretical response for a Simple Harmonic Oscillator.  The same fit function is shown in both graphs.

Harmonic Oscillator