Does anyone know what the name of that sound absorbing foam, used in studios and such, is called...or where to get it? It's usually black, soft foam rubber, looks like a bunch of stalactites are on it??? Kind of like black, foam, egg cartons? I'm contemplating putting this on the ceiling in the HT room I'm currently designing. They would certainly help lower the sonic boom through the floor upstairs and, I can hide all my wiring underneath the foam rubber material. Not to mention it should help wiping out alot of the audio reflections I have in my basement. Any help is greatly appreciated!