vacsimile,
"Eggcrate" foams are designed to enhance the acoustics in a room by reducing reverberation (echoes). These foams are not designed to block sound. There is a difference in foam products: contour, thickness, and performance. To compare a foam you need to look at its performance in terms of its ability to absorb sound. The industry standard is a unit of measure specified as Noise Reduction Coefficient (NRC). The higher the number the better the performance of the foam where a unit of 1.00 or better is desirable. This number reflects the amount of sound absorbed at several frequency points. Take a look at our line of Acoustic Foams and their corresponding performance at:
http://www.soundproofing.org/sales/acousticfoams.htmTo contain the sound you may need to add Mass Loaded Vinyl (MLV) barrier in combination with Green Glue sandwiched between two layers of drywall. The MLV blocks and reflects sound. Green Glue is a sound dampener that lowers the resonant frequency of your wall. Take a look at the following pages to learn about these two products:
http://www.soundproofing.org/brochures/mass_loaded_vinyl.htmhttp://www.soundproofing.org/sales/GreenGlue.htmIf you need further assistance, call 760-752-3030 to discuss your project.
Alex