Mass Loaded Vinyl (MLV) is a versatile and economical soundproofing material for windows, created from PVC and vinyl that has a major material for example barium sulphate or calcium carbonate. Soundproof from aggravating low-frequency noise with bass traps: big items of insulating resources placed at strategic factors in the room. https://arthurpmjmd.bloguetechno.com/the-basic-principles-of-window-soundproofing-75013474