Loud sounds can penetrate through windows and make a home uninviting. Sounds like traffic, trains, planes or even neighbours can ruin sleep or cause distractions in everyday living. Soundproofing a window does not need to cost much and it can be done without a professional. Easy soundproofing options for most windows can lower the noise that makes it into the house and sounds that reach the neighbours outside the house.
Place heavy curtains or a quilt above the window and keep it closed. These are soft materials that absorb the sound and minimise it so much less noise gets through the window. The curtains can be an aesthetically pleasing way to soundproof the room and they are much less expensive than replacing the windows. A quilt is another good option, though it is less aesthetically pleasing than the curtains. Both of these options can be easily removed or moved aside for light.
Fold up soundproofing mats to form a window plug and insert the plugs around the window frame. The window plugs should be around 2.5 to 5 cm (1 to 2 inches) thick for optimal effectiveness. They block out sounds that get in through cracks and minor gaps in the window frame. These will typically block out light.
Lean a mattress against the wall and window. Mattresses are a temporary soundproofing measure. Like the curtains and quilt, a mattress will absorb the sounds. It is thicker than the quilt and curtains, so soundproofing will be more complete, but it is not aesthetically pleasing.
Remove some of the furniture and other items in the room. Sounds can bounce off certain materials like wood, brick or similar hard structures and become amplified. The more space between sounds, the softer the sounds become by the time they travel to the sound-absorbent materials.