MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Perforated aluminum panel, with corrugations 5/8 inch deep, 1 1/2 pcf 2 inch fiberglass backing
Flat Baf
PTB reference data
Original description
Perforated aluminum panel, with corrugations 5/8 inch deep, 1 1/2 pcf 2 inch fiberglass backing
Material properties
Manufacturer: Alpro Structural Systems Corp.
Thickness: 50.8 mm
Wall distance: 400 mm
Perforation: perforated
Backing: 50.8 mm fiberglass (24.03 kg/m³)
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.94
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 1.00 | 1.00 | 1.05 | 1.00 | 0.85 |
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Method (354): Measured