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 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 3 variants
NRC
0.95
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.70 | 1.00 | 1.00 | 1.00 | 1.00 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | ||
|---|---|---|---|
| 4 inches | 0.67 lb/ft² | NRC0.95 | |
| 3 inches | 0.51 lb/ft² | NRC0.85 | |
| 2 inches | 0.34 lb/ft² | NRC0.70 |
NRC: 0.95 (derived from ISO 354 lab data)
Dimensions: 24 x 48 in., 48 x 48 in.
Distance: 0
Measured values as a table (3 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 2 inches · 0.34 lb/ft² · 0 | 0.70 | 0.08 | 0.25 | 0.61 | 0.92 | 0.95 | 0.92 |
| 3 inches · 0.51 lb/ft² · 0 | 0.85 | 0.14 | 0.43 | 0.98 | 1.03 | 1.00 | 1.00 |
| 4 inches · 0.67 lb/ft² · 0 | 0.95 | 0.20 | 0.70 | 0.98 | 1.06 | 1.01 | 1.00 |
Measured values as a table (3 measurements)
Access frequency bands, variants and export. Create a permanent free account
Last updated:
