StoneBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Odeon (Index 1001)
55 mm perforated bricks on edge, 78 holes per brick, 11% perforation
PTB reference data
Original description
55 mm perforated bricks on edge, 78 holes per brick, 11% perforation
Material properties
Thickness: 55 mm
Wall distance: 50 mm
Perforation: 11%
Backing: 50 mm mineral wool
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.48
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.25 | 0.15 | 0.10 | 0.20 | 0.10 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Method (354): Measured