FabricHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 a 5-7
Value from the PTB table, not verified
Satin drapes, gathered
PTB reference data
Original description
Satin drapes, gathered
Material properties
Wall distance: 7.9 in
Surface weight: 0.421 kg/m²
Flow resistance: 82 Rayl
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 | 0.10 | 0.55 | 1.00 | 0.90 | 0.95 | 0.90 |
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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 | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0,421 kg/m^2 · 200 mm · Materialfläche / Prüffläche = 1,5 | 0.85 | 0.00 | 0.09 | 0.21 | 0.33 | 0.55 | 0.80 | 0.93 | 1.03 | 1.00 | 0.92 | 0.89 | 0.93 | 0.88 | 0.93 | 0.97 | 0.95 | 0.92 | 0.90 | 0.95 |
Measured values as a table (1 measurement)
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