Plastic & filmHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA 1968, Tabelle a3.2-14
Value from the PTB table, not verified
Porous hard foil in trapezoidal profile on battening
PTB reference data
Original description
Porous hard foil in trapezoidal profile on battening
Material properties
Thickness: 0 in
Wall distance: 7.9 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.75
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.65 | 0.85 | 0.65 | 0.75 | 0.75 |
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Value from the PTB table, not verified
NRC: 0.75 (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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 mm · 0,89 kg/m^2 · 200 mm · Montiert on Lattung 10 / 38 mm, Air cavity 200 mm durch Abstandsklötze zwischen Wand and Lattung, Lattenabstand 1m. Seitlicher Rand des Prüffeldes geschlossen · poröse Oberfläche, Trapezprofil-Formgebung: Profilmaße: Plateau-Tal 40 mm, Plateau-width 60 mm, Tal-width 20 mm, Abstand zweier Plateaukanten über Tal 65 mm | 0.75 | 0.18 | 0.22 | 0.22 | 0.55 | 0.61 | 0.73 | 0.93 | 0.90 | 0.68 | 0.53 | 0.63 | 0.75 | 0.70 | 0.76 | 0.78 | 0.78 | 0.75 | 0.75 | 0.68 |
Measured values as a table (1 measurement)
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