MetalHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: RAMSETE
Perforated metal ceiling with 30 mm mineral wool
PTB reference data
Original description
Perforated metal ceiling with 30 mm mineral wool
Material properties
Hole size: 3 mm
Backing: 30 mm mineral wool
Application: ceiling
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.70
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.50 | 0.80 | 0.75 | 0.70 | 0.75 |
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Method (354): Measured
