Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Dalenbäck, Datensatz der CATT-Software, November 2000. Data-Category in CATT: BRICK_WALL8, C: Walls, D: Bricks
Value from the PTB table, not verified
Walls, bricks with 19 holes (facing out), 50 mm from hard wall with mineral wool
PTB reference data
Original description
Walls, bricks with 19 holes (facing out), 50 mm from hard wall with mineral wool
Material properties
Wall distance: 50 mm
Backing: mineral wool
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.70
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 1.00 | 0.85 | 0.60 | 0.80 | 0.65 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 50 mm from hard wall with mineralwool · bricks with 19 holes (facingout) | 0.70 | 0.37 | 0.99 | 0.85 | 0.60 | 0.80 | 0.65 |
Measured values as a table (1 measurement)
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