FabricHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 a 5-5
Value from the PTB table, not verified
Folded linen-textured fabric (rayon, linen, cotton)
PTB reference data
Original description
Folded linen-textured fabric (rayon, linen, cotton)
Material properties
Wall distance: 2 in
Surface weight: 0.167 kg/m²
Flow resistance: 17 Rayl
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.90
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.40 | 0.80 | 1.00 | 1.00 | 1.00 |
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Value from the PTB table, not verified
NRC: 0.90 (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 | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0,167 kg/m^2 · 50 mm · gefaltet, Materialfläche / Prüffläche = 3 | 0.90 | 0.10 | 0.08 | 0.10 | 0.18 | 0.53 | 0.55 | 0.57 | 0.85 | 1.02 | 1.23 | 0.94 | 1.08 | 1.28 | 1.26 | 0.98 | 1.13 | 1.12 | 1.05 | 1.20 |
Measured values as a table (1 measurement)
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