To soundproof windows, start by using acoustic caulk to seal gaps around the window frame. Add window inserts or use heavy, soundproof curtains to block out noise. Consider installing laminated glass or adding a secondary window for enhanced sound insulation. Ensure all gaps and cracks are sealed to maximize noise reduction.

Soundproof windows by sealing gaps with acoustic caulk, using soundproof curtains, and considering laminated glass or secondary windows. Seal all gaps for maximum noise reduction.