12 Pack (12x12x2)" Pyramid Foam Acoustic Panel for Soundproofing Studio/Home Theater

12 Pack of (12x12x2) Inch Pyramid Acoustical Foam (Color-Charcoal) for Soundproofing Studio/Home Theater Model 12P-12x12x2 2 inch pyramid foam is effective against standing waves and flutter echoes in most small-to-medium sized rooms like vocal booths, control rooms and studios. It also functions as a full-frequency bandwidth absorber for any size room when used in conjunction with corner bass absorbers and male/female broadband absorbers. Specifications Quantity = 12 Pieces Size = (12 x 12) Inch Thickness = 2 Inches Color = Charcoal Grey Overall NRC: 0.45 Flammability Test Results Class A 25 Flame Spread Index 250 Smoke Spread Index   The overall NRC rating is the calculated average of frequencies 250Hz, 500Hz, 1000Hz and 2000Hz. > 125 Hz 250 Hz 500 Hz 1000 Hz 2000 Hz 4000 Hz Overall 1" Pyramid 0.14 0.13 0.31 0.43 0.46 0.54 0.35 2" Pyramid 0.19 0.22 0.45 0.55 0.60      0.76 0.45 3" Pyramid 0.24 0.29 0.55 0.56 0.61