bxi double noise insulation soundproofing foam - 39.4 x 13.4 x 1 inches egg crate sound proof acoustic foam panels - sound dampening panels for hvac, pipe, machine, wall and door bxi acoustics-dual effects<br><br> bxi double noise insulation soundproof foam consists of acoustic foam and soundproofing rubber, specially designed by professional sound engineers to meet the needs of both absorption and soundproofing.<br><br> acoustic foam is used as a sound absorption solution to control the sound pressure levels within a space. rubber is used as a means of soundproofing by adding mass to a space in order to stop sound waves from exiting a surface, and it’s also excellent at reducing vibrations.<br><br> both of them play a key role in high standard soundproofing project, taking into account various sounds.<br><br> customer survice<br><br> please note that foams are newly made and may come with a little smell, which will disappear in time. if you don't like this item, we support 100% refund or replacement without question asked.<br><br> keypoints for soundproofing:<br> 1. the soundproof foam needs to completely cover the noise source because noise can easily go through gaps.<br> 2. for bass noise made by machines, please firstly put some anti vibration pads under the machines.<br> 3. for doors/ windows/ walls/ceiling soundproofing, please firstly use acoustic sealant to seal all the cracks and gaps on/between them.<br>