im trying to gather a list of materials that can be used in different structures to insulate sounds, and sound waves(i.espeaker box, recording studios, recording booths) i need to keep the interior sounds inside the structure and also all the exterior sounds outsideim really interested in finding pros and cons of each materialso i can determine the best material for each projectand projected costany info is greatly appreciatedif someone knows a website i can go to that would be truly helpful thanks in advance
