Let us continue the discussion by Maeda and Kitano. "O-H stretching vibration bands of Raman scattering from water have been studied more extensively than any other Raman bands of water. … The O-H stretching Raman band of liquid water is very broad and consists of several overlapping components, and interpretation of the band itself is the subject of considerable discussion. These components were considered to have arisen from the unperturbed O-H stretching band by intra-and intermolecular vibrational coupling of O-H oscillators and/or Fermi resonance with the first overtone of the bending motion of the H2O molecule. However, the influence of Fermi resonance has recently been shown to be weak or absent, and today this idea seems obsolete" . This is the overtone mentioned by , centered at 3052 cm -1 . Following Maeda and Kitano, it can be neglected.