OtherLow absorption
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: RAMSETE
ceiling thickness=21.5 prestressed rafters and brick block A type
PTB reference data
Original description
ceiling thickness=21.5 prestressed rafters and brick block A type
Material properties
Thickness: 21.5 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.03
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.00 | 0.00 | 0.00 | 0.05 | 0.05 | 0.05 |
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Method (354): Measured