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
Sonex Baffles 2-sided wedge-shaped melamine foam, hanging panels
Baffles
PTB reference data
Original description
Sonex Baffles 2-sided wedge-shaped melamine foam, hanging panels
Material properties
Manufacturer: Sonex Division
Thickness: 3 inches
Mounting: hanging panels
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
1.45
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.75 | 0.80 | 1.00 | 1.00 | 1.00 | 1.00 |
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Value from the PTB table, not verified
NRC: 1.45 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 3 inches · 0.40 lb/ft² | 1.45 | 0.74 | 0.78 | 1.42 | 1.76 | 1.83 | 1.84 |
Measured values as a table (1 measurement)
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