FoamHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 173
Value from the PTB table, not verified
illbruck illsonic S 35 SV polyurethane foam, profiled
illsonic – S 35 SV, spezial S 35 SV
PTB reference data
Original description
illbruck illsonic S 35 SV polyurethane foam, profiled
Material properties
Manufacturer: illbruck GmbH
Thickness: 2 in, 2.6 in, 2.8 in
Surface: profiled on one side
Up to fire class: UL 94 HF 1
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 | 0.25 | 0.70 | 0.95 | 1.00 | 1.00 | 1.00 |
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| Compare | Value | |
|---|---|---|
| 2.6 in | NRC0.95 | |
| 2.8 in | NRC0.95 | |
| 2 in | NRC0.80 |
NRC: 0.95 (derived from ISO 354 lab data)
Weight / density: ca. 35 kg / m³
Dimensions: 1000 x 39 in
Measured values as a table (3 measurements)
| Build-up | NRC | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 mm · ca. 35 kg / m³ · einseitig profiliert (Pyramiden) | 0.80 | 0.10 | 0.19 | 0.24 | 0.31 | 0.44 | 0.60 | 0.79 | 0.85 | 0.94 | 1.03 | 1.05 | 1.08 | 1.11 | 1.14 | 1.17 | 1.20 |
| 70 mm · ca. 35 kg / m³ · einseitig profiliert (Pyramiden) | 0.95 | 0.13 | 0.25 | 0.40 | 0.58 | 0.70 | 0.83 | 1.00 | 1.03 | 1.08 | 1.15 | 1.15 | 1.15 | 1.15 | 1.16 | 1.19 | 1.20 |
| 65 mm · ca. 35 kg / m³ · einseitig profiliert (Pyramiden) | 0.95 | 0.15 | 0.35 | 0.58 | 0.77 | 0.82 | 0.90 | 1.00 | 1.00 | 1.00 | 1.01 | 1.00 | 1.00 | 1.00 | 1.06 | 1.12 | 1.18 |
Measured values as a table (3 measurements)
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