MetalBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Aluminum metal panels with mineral fiber backing
PTB reference data
Original description
Aluminum metal panels with mineral fiber backing
Material properties
Thickness: 0.5 mm
Wall distance: 164 mm
Perforation: free slot width between panels 15 mm
Backing: 20 mm mineral fiber panel
Flow resistance: 0.06 kPa·s/m²
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.45
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.60 | 0.80 | 0.65 | 0.25 | 0.15 |
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Method (354): Measured
