[Kelly Green]
[Brown]
[Forest Green]
[Blue]
[Orange]
[Charcoal]
48 Pack of (12x12x2) Inch Acoustical Wedge Foam for Soundproofing Studio/Home Theater 2 inch wedge 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. The 48 packs of wedge foam are available in the following colors: Charcoal, Red, Orange, Rosy Beige, Brown, Burgundy, Blue, Purple, Plum, Teal, Kelly Green, and Forest Green. Specifications Quantity = 48 Pack of Wedge Acoustic Foam Size = (12 x 12) Inch Thickness = 2 Inch Overall NRC: 0.65 Flammability Test Results Class A 25 Flame Spread Index 250 Smoke Spread Index This foam is truly colorized and not surface-painted, ensuring uniformity, and it is designed to resist light, humidity, temperature, sweat and cigarette smoke. Identical, Side to Side All our soundproofing foam is cut and angled with nearly 100 percent accuracy, leaving you with clean, squared edges. So that our foam can be aligned perfectly with the next piece to provide professional uniformity in your installation. Noise Reduction Coefficient (NRC) Overall is 0.65 Acoustical foams effectiveness is measured by its Noise Reduction Coefficient, or NRC rating. The NRC of a material can be found by using the Reverberation Room Method (ASTM C423) 1) Approximately 72 square feet of material is rested on the floor of a reverberation chamber. This chamber usually has all hard concrete surfaces. 2) The change in absorption from the room without material compared to the room with material is measured. 3) The changes in sound are measured for octave bands ranging from 125Hz to 4000Hz, recording the differences in Sabin absorption coefficients. The overall NRC rating is the calculated average of frequencies 250Hz, 500Hz, 1000Hz and 2000Hz