FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Wedge-shaped, polyurethane foam panels
PTB reference data
Original description
Wedge-shaped, polyurethane foam panels
Material properties
Manufacturer: Sonex Division
Thickness: 2 inches, 3 inches, 4 inches
Wall distance: 0 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 3 variants
αw
1.00
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.70 | 1.00 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | ||
|---|---|---|---|
| 4 inches | 0.67 lb/ft² | αw1.00 | |
| 3 inches | 0.51 lb/ft² | αw0.75 | |
| 2 inches | 0.34 lb/ft² | αw0.55 |
Dimensions: 24 x 48 in., 48 x 48 in.
Distance: 0
Measured values as a table (3 measurements)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 2 inches · 0.34 lb/ft² · 0 | 0.55 | 0.08 | 0.25 | 0.61 | 0.92 | 0.95 | 0.92 |
| 3 inches · 0.51 lb/ft² · 0 | 0.75 | 0.14 | 0.43 | 0.98 | 1.03 | 1.00 | 1.00 |
| 4 inches · 0.67 lb/ft² · 0 | 1.00 | 0.20 | 0.70 | 0.98 | 1.06 | 1.01 | 1.00 |
Measured values as a table (3 measurements)
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