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: 15 mm
Wall distance: 400 mm, 0 mm
Up to fire class: A2
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.45
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.20 | 0.45 | 0.65 | 0.65 | 0.95 |
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| Compare | Value | |
|---|---|---|
| 400 mm | αw0.45 | |
| 0 | αw0.45 |
Measured values as a table (2 measurements)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 15 mm · 400 mm | 0.45 | 0.18 | 0.21 | 0.46 | 0.67 | 0.67 | 0.95 |
| 15 mm · 0 | 0.45 | 0.10 | 0.21 | 0.47 | 0.68 | 0.67 | 0.74 |
Measured values as a table (2 measurements)
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