Plaster & sprayHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data www.sto.at
Value from the PTB table, not verified
Sto acoustic spray plaster, Euroclass A2
Sto acoustic spray plaster
PTB reference data
Original description
Sto acoustic spray plaster, Euroclass A2
Material properties
Manufacturer: Sto Ges.m.b.H
Thickness: 0.6 in
Wall distance: 16 in, 0 in
Up to fire class: A2
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 2 variants
NRC
0.50
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.20 | 0.45 | 0.65 | 0.65 | 0.95 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | |
|---|---|---|
| 16 in | NRC0.50 | |
| 0 | NRC0.50 |
NRC: 0.50 (derived from ISO 354 lab data)
Measured values as a table (2 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 15 mm · 400 mm | 0.50 | 0.18 | 0.21 | 0.46 | 0.67 | 0.67 | 0.95 |
| 15 mm · 0 | 0.50 | 0.10 | 0.21 | 0.47 | 0.68 | 0.67 | 0.74 |
Measured values as a table (2 measurements)
Access frequency bands, variants and export. Create a permanent free account
Last updated:
