MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Wärme Kälte Schall, Heft 1 (März) 1970
Perforated metal cassette ceiling with 20 mm Sillan acoustic panels
PTB reference data
Original description
Perforated metal cassette ceiling with 20 mm Sillan acoustic panels
Material properties
Wall distance: 350 mm
Perforation: approx. 15%
Backing: 20 mm Sillan acoustic panels
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.73
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.50 | 0.85 | 0.70 | 0.85 | 0.85 | 0.80 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Method (354): Measured
