Stone & concreteHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Odeon (Index 1000)
Value from the PTB table, not verified
55 mm perforated bricks on edge, 23% perforation, 50 mm mineral wool
PTB reference data
Original description
55 mm perforated bricks on edge, 23% perforation, 50 mm mineral wool
Material properties
Thickness: 2.2 in
Wall distance: 2.8 in
Perforation: 23%
Backing: 2 in mineral wool
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.75
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.35 | 0.25 | 0.15 | 0.25 | 0.20 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
Value from the PTB table, not verified
NRC: 0.75 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 63 Hz | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz | 6300 Hz | 8000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Measurement 1 | 0.75 | 0.45 | 0.00 | 0.45 | 0.00 | 0.00 | 0.99 | 0.00 | 0.00 | 0.80 | 0.00 | 0.00 | 0.49 | 0.00 | 0.00 | 0.70 | 0.00 | 0.00 | 0.55 | 0.00 | 0.00 | 0.55 |
Measured values as a table (1 measurement)
Access frequency bands, variants and export. Create a permanent free account
Last updated: