Plastic & filmHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA 1968, Tabelle a3.2-13
Value from the PTB table, not verified
Porous hard foil in trapezoidal profile shape
PTB reference data
Original description
Porous hard foil in trapezoidal profile shape
Material properties
Thickness: 1 mm
Wall distance: 10 mm
Dimensions: trapezoidal profile, plateau-valley 40 mm, plateau-width 60 mm
Surface weight: 0.89 kg/m²
Flow resistance: 31 Pa·s/m
Mounting: on 10 / 38 mm battens, 1 m batten spacing
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.35
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.35 | 0.65 | 0.80 | 0.70 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 mm · 0,89 kg/m^2 · 10 mm · Montiert on Lattung 10 / 38 mm, Air cavity 10 mm, Lattenabstand 1m. · poröse Oberfläche, Trapezprofil-Formgebung: Profilmaße: Plateau-Tal 40 mm, Plateau-width 60 mm, Tal-width 20 mm, Abstand zweier Plateaukanten über Tal 65 mm | 0.35 | 0.05 | 0.04 | 0.10 | 0.07 | 0.14 | 0.15 | 0.25 | 0.33 | 0.43 | 0.55 | 0.60 | 0.77 | 0.78 | 0.79 | 0.78 | 0.75 | 0.67 | 0.75 | 0.73 |
Measured values as a table (1 measurement)
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