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Acoustic Specs

SORBER NRC Ratings:

The Noise Reduction Coeffecient (NRC) is a single-number index determined in a lab test and used for rating how absorptive a particular material is. This industry standard ranges from zero (perfectly reflective)
to 1 (perfectly absorptive). It is simply the average of the mid-frequency sound absorption coefficients
(250, 500, 1000 and 2000 Hertz) rounded to the nearest 5%.

Based on the testing methodology, and depending upon the material's shape or surface area, some products can test at an NRC above 1.

NRC Rating at each frequency:
125Hz
250Hz
500Hz
1000Hz
2000Hz
4000Hz
Overall NRC Rating
SORBER 1.5" (38mm) thick .29 .60 1.11 1.12 1.10 1.07 1.00
Competitors 2" StudioFoam .11 .30 .91 1.05 .99 1.00 .80
Generic 2" Acoustic Foam .19 .22 .45 .55 .60 .76 .45


1/4" Acrylic dB Reduction:

Frequency: 100Hz 1000Hz 10K
dB Reduction: -7 dB -13dB -28dB