Another useful approach for computational vibrational spectroscopy, called driven molecular dynamics (DMD), was proposed by Bowman et al. . In this method, a sinusoidal driving force is added to the Hamiltonian. The driving frequency can be varied through a frequency range and energy absorption should maximize locally at the normal mode frequencies. An examination of the molecular motion at a given resonance provides the corresponding normal mode. This DMD method was coupled with the determination of the IR spectra itself through the Fourier transform of the autocorrelation function by Thaunay et al. .