The upper the OITC ranking, the better a window is at lessening sound transmission. Conventional one-pane windows with wood or vinyl frames have an OITC of 19. As sound can't travel in a vacuum, some extremely Highly developed glazing units produce a vacuum amongst the glazing to halt sound useless. https://gregorytisah.fitnell.com/70715764/detailed-notes-on-noise-reduction-benefits-of-acoustic-windows