Instead of reflecting noise, soundproof foam is able to absorb the sound wave, softening echo and reverberation to reduce the noise.
Example: Soundproof foam (xpe）is able to fill in space on door frames where noise loves to leak in and out of rooms, which is called compressible foam gasket, it also helps seal up the gap and absorb some of the sounds. The door sweep portion is to seal up the floor of the door, especially on hard floors.
There are two methods of sound insulation: absorbing sound and blocking sound. XPE FOAM- soundproof foam for walls belongs to the latter. Blocking sound requires materials that are heavy, dense and thick so that sound will not penetrate or pass through.
Here are a few things must be taken into consideration when choosing soundproof foam for walls.
1. Patterns of the surface: pyramids are most popular, wedges and plain.
2. Thickness: the thicker the panel is, the better the effect will be
3. Noise reduction rating: noise reduction coefficient
4. Dimensions: usually sold in sheets/packs/blocks