WoodBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.2-9
Spruce wood paneling, slotted, 10 mm slots, mineral fiber backing
PTB reference data
Original description
Spruce wood paneling, slotted, 10 mm slots, mineral fiber backing
Material properties
Thickness: 20 mm
Wall distance: 50 mm
Perforation: every second slot open
Hole size: 10 mm
Backing: mineral fiber blanket on bitumen paper
Surface: unpainted
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.32
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.80 | 0.40 | 0.15 | 0.10 | 0.10 |
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Method (354): Measured