Abstract: An insulating glass pane assembly and its use. The assembly includes at least two panes of glass sealingly connected to each other and held apart from each other by a crosspiece attached on the perimeters thereof. The crosspiece is provided with at least one layer of sound-reducing material attached in such a way that it prevents the transmisson of sound from pane to pane by way of the crosspiece. The assembly can be used to produce windows by providing a window pane having grooves therein disposed in such a way that they receive and retain the panes of glass within the window frame. A sound-reducing material is attached in the grooves to insulate the panes of glass on all sides against the window frame in a sound-reducing manner. The assembly is completed by installing the panes of glass in the grooves in the window frame. With these features, the insulating glass pane assembly and its use successfully prevent the transmission of sound from pane to pane by way of the crosspieces.