MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Herstellerangabe unter www.ibp.fhg.de/rata
Fraunhofer IBP micro-perforated metal cassette
PTB reference data
Original description
Fraunhofer IBP micro-perforated metal cassette
Material properties
Manufacturer: Fraunhofer IBP
Wall distance: 50 mm, 100 mm, 200 mm, 400 mm
Perforation: <1%
Hole size: 0.5 mm
Application: suspended ceiling
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 4 variants
αw
0.45
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.55 | 0.65 | 0.45 | 0.45 | 0.40 | 0.15 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | |
|---|---|---|
| 400 mm | αw0.45 | |
| 200 mm | αw0.44 | |
| 100 mm | αw0.34 | |
| 50 mm | αw0.30 |