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Sound Absorption: spray foam open cell
Sound absorption coefficients and NRC ratings for building materials — fiberglass, carpet, concrete, drapery, ceiling tile, etc. per ASTM C423 and ASHRAE Ch.49
| material | product variant | alpha 1000 (dimensionless) | alpha 125 (dimensionless) | alpha 2000 (dimensionless) | alpha 250 (dimensionless) | alpha 4000 (dimensionless) | alpha 500 (dimensionless) | category | description | mounting | nrc (dimensionless) |
|---|---|---|---|---|---|---|---|---|---|---|---|
| spray foam open cell | 4in 0.5pcf | 0.72 | 0.11 | 0.71 | 0.43 | 0.67 | 0.89 | insulation | Open-cell spray polyurethane foam 4 in 0.5 pcf density | Type A | 0.69 |
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