FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data unter http://www.illbruck-raumakustik.de
Value from the PTB table, not verified
illbruck absorber ECO melamine foam element, free-hanging
absorber ECO
PTB reference data
Original description
illbruck absorber ECO melamine foam element, free-hanging
Material properties
Manufacturer: illbruck GmbH
Wall distance: row center distance 25 in
Mounting: free-hanging
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.85
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.35 | 0.70 | 1.00 | 1.00 | 1.00 |
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Value from the PTB table, not verified
NRC: 0.85 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| free-hanging, Reihenmittenabstand 625 mm | 0.85 | 0.14 | 0.14 | 0.20 | 0.25 | 0.32 | 0.44 | 0.60 | 0.70 | 0.83 | 1.00 | 1.13 | 1.16 | 1.20 | 1.22 | 1.21 | 1.20 | 1.20 | 1.20 |
Measured values as a table (1 measurement)
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