FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 172
Value from the PTB table, not verified
illsilent flexible polyurethane foam, pyramid profile
illsilent – S 20 Z, S 20 SEF, S 28 SV/SEF
PTB reference data
Original description
illsilent flexible polyurethane foam, pyramid profile
Material properties
Manufacturer: illbruck GmbH
Thickness: 100 mm, 70 mm
Wall distance: 0 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.80
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.50 | 0.85 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | |
|---|---|---|
| 100 mm | αw0.80 | |
| 70 mm | αw0.60 |
Weight / density: ca. 20 - 28 kg / m³
Dimensions: 1000 x 1000 mm
Distance: 0
Measured values as a table (2 measurements)
| Build-up | αw | 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 | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 100 mm · ca. 20 - 28 kg / m³ · 0 · einseitig profiliert (Pyramiden) | 0.80 | 0.04 | 0.06 | 0.21 | 0.39 | 0.53 | 0.63 | 0.78 | 0.90 | 0.93 | 0.99 | 1.02 | 1.00 | 0.99 | 0.97 | 1.00 | 1.03 | 1.09 | 1.15 | 1.18 |
| 70 mm · ca. 20 - 28 kg / m³ · 0 · einseitig profiliert (Pyramiden) | 0.60 | 0.06 | 0.10 | 0.18 | 0.21 | 0.28 | 0.40 | 0.47 | 0.59 | 0.77 | 0.90 | 1.08 | 1.08 | 1.07 | 1.07 | 1.05 | 1.02 | 1.01 | 0.99 | 0.98 |
Measured values as a table (2 measurements)
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