Window, Doors and Walls

If you are considering insulating a room as part of your soundproofing project, you may also want to explore using a special soundproof window treatment to compliment your soundproofing project. They are available in a variety of styles. You are not limited to institutional-style suspended Window Treatments. These treatments will help reduce noise traveling through the Window and make your room more quiet and comfortable by being more soundproof.

windows
Most of the sound entering the house comes in through the windows. Check your windows and see if there is anywhere that air can come through- those will be points where the sound comes through the most. Seal any of these cracks and gaps with flexible polyurethane or latex caulk. This is a great way to make you home more energy efficient as well! Installing weather strips and storm windows will do wonders for the energy-efficiency of your home as well as make the whole house quieter. Windows that are vinyl-framed and double-paned are best for sound and can be more than twice as strong for temperature insulation!

Doors and Walls

The best way to soundproof your walls is to build them with solid, heavy material to dampen sound traveling through it. Light, flimsy, and hollow materials will not prevent sound from traveling in your home.

If your walls have already been constructed and you're looking for ways to help dampen sounds traveling through them, there's still a great deal that can be done. Adding insulation to your walls can help, if it's done right. Adding drywall is a poor decision, as its rigid material is not strong for sound-dampening and the space behind the drywall can create an acoustic chamber. Make sure that all holes and cracks are covered when insulating- even a small gap will allow noise to enter. Even attics can allow sound into your home and could benefit from proper insulation.

Adding mass to your walls can help as well. If you have one wall facing an especially busy or noisy street, padding that wall with dense material can help. Hollow walls can be soundproofed by adding injected blown foam insulation. Rough surfaces in your room will deaden sound. Acoustic sprays are available that can give texture to your walls and absorb sounds that hit them.

When installing doors, choose heavy, solid-core doors over lighter hollow-core ones. Hollow doors with a space inside are filled with air, which allows sound to travel through with ease. Making your doors airtight will do a great deal for both insulating and soundproofing your home. If you've been putting off lubricating those squeaky door hinges, there's no time like the present to quiet them!

Reference: Answer.com