https://doi.org/10.1351/goldbook.08276
Highest frequency or wavenumber that can be characterized by sampling at a given rate in order to be able to fully reconstruct the signal without artefacts.
Note: The Nyquist sampling theorem states that an FID or interferogram must be sampled at a rate at least twice the highest frequency in the FID or interferogram in order to reproduce the correct frequencies in an NMR or Fourier-transform infrared spectrum, respectively, without folding (folding (in spectroscopy)) artefacts. \(f_{\rm{Nyquist}} = ½\nu\).