MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Wärme Kälte Schall, Heft 1 (März) 1970
Perforated metal panel ceiling, 20 mm Sillan acoustic panels, 350 mm cavity
PTB reference data
Original description
Perforated metal panel ceiling, 20 mm Sillan acoustic panels, 350 mm cavity
Material properties
Wall distance: 350 mm
Backing: 20 mm Sillan acoustic panels
Application: ceiling
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.75
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 0.85 | 0.75 | 0.80 | 0.80 | 0.75 |
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Method (354): Measured
