MetalLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968, b2.2-5
Aluminum metal panel with mineral fiber backing
PTB reference data
Original description
Aluminum metal panel with mineral fiber backing
Material properties
Thickness: 0.5 mm, 16 mm
Wall distance: 344 mm
Backing: 20 mm mineral fiber panel
Mounting: on mounting rail
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.52
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.80 | 0.70 | 0.60 | 0.25 | 0.25 |
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Method (354): Measured