OtherHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA 1968, Tabelle a3.2-13
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
0.43
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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Method (354): Measured