If you're looking to deaden sound and reduce noise transmission through a shared wall, there are several materials and techniques you can consider. Here are a few options:
Acoustic Panels: Installing acoustic panels on the shared wall can help absorb and reduce sound reflections. These panels are designed to dampen noise and improve sound quality in a room.
Mass-Loaded Vinyl (MLV): MLV is a dense vinyl material that is effective in blocking sound transmission. You can install MLV by attaching it to the existing wall or by using it as an additional layer under a new layer of drywall.
Insulation: Adding insulation within the wall cavity can help absorb sound vibrations. Consider using soundproofing insulation materials, such as mineral wool or cellulose, as they have good sound-absorbing properties.
Double-Layered Drywall: Installing a second layer of drywall on the existing wall can help increase its mass and reduce sound transmission. Be sure to use a soundproofing compound between the layers and consider using resilient channel clips to decouple the new drywall from the existing wall.
Green Glue: Green Glue is a viscoelastic compound that is used between layers of drywall to reduce sound transmission. It acts as a damping material, converting sound energy into heat. Apply it between two layers of drywall during installation.
Sealing and Caulking: Use acoustic sealant or caulk to seal any gaps, cracks, or openings in the wall. This can help prevent sound leakage and improve the overall soundproofing effectiveness.
Remember that soundproofing methods may vary depending on the specific structure and situation. If possible, consult with a professional or soundproofing specialist who can assess your situation and provide tailored advice for your specific needs.