MetalLow-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Wärme Kälte Schall, Heft 1 (März) 1970
Unperforated metal panel ceiling with Sillan acoustic panels
PTB reference data
Original description
Unperforated metal panel ceiling with Sillan acoustic panels
Material properties
Wall distance: 350 mm
Backing: 20 mm thick Sillan acoustic panels
Application: ceiling
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.56
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.70 | 0.80 | 0.80 | 0.60 | 0.30 | 0.25 |
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Method (354): Measured
