Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Dalenbäck, Datensatz der CATT-Software, November 2000. Data-Category in CATT: BRICK_WALL6, C: Walls, D: Bricks
Value from the PTB table, not verified
Brick wall with 78 holes, 50 mm mineral wool backing
PTB reference data
Original description
Brick wall with 78 holes, 50 mm mineral wool backing
Material properties
Wall distance: 2 in
Perforation: 78 holes
Backing: 2 in mineral wool
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.50
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.50 | 0.75 | 0.40 | 0.25 | 0.65 | 0.35 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
NRC: 0.50 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 50 mm from hard wall with mineralwool · bricks with 78holes (facingout) | 0.50 | 0.48 | 0.77 | 0.38 | 0.27 | 0.65 | 0.35 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: