Plaster & sprayHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data www.knauf.de
Value from the PTB table, not verified
Knauf P 142 acoustic plaster, gypsum-bound
Knauf Akustikputz – P 142
PTB reference data
Original description
Knauf P 142 acoustic plaster, gypsum-bound
Material properties
Manufacturer: Knauf Headquarters Iphofen
Wall distance: 0 mm, 60 mm
Up to fire class: A1
Application: ceiling
Mounting: directly on solid ceiling; on gypsum board ceiling facing
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.30
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.25 | 0.45 | 0.70 | 1.00 |
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value | |
|---|---|---|
| 0, direkt on Massivdecke | αw0.30 | |
| 60 mm, on Deckenbekleidung from Gipsplatten | αw0.30 |
Weight / density: ca. 3 kg / m² at 15 mm Schichtdicke
Measured values as a table (2 measurements)
| Build-up | αw | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ca. 3 kg / m² at 15 mm Schichtdicke · 0, direkt on Massivdecke | 0.30 | 0.03 | 0.04 | 0.04 | 0.06 | 0.09 | 0.12 | 0.19 | 0.24 | 0.31 | 0.37 | 0.43 | 0.52 | 0.61 | 0.72 | 0.81 | 0.98 | 1.06 | 1.01 |
| ca. 3 kg / m² at 15 mm Schichtdicke · 60 mm, on Deckenbekleidung from Gipsplatten | 0.30 | 0.11 | 0.19 | 0.17 | 0.17 | 0.15 | 0.15 | 0.18 | 0.21 | 0.25 | 0.33 | 0.42 | 0.50 | 0.60 | 0.72 | 0.81 | 0.99 | 1.01 | 1.03 |
Measured values as a table (2 measurements)
Access frequency bands, variants and export. Create a permanent free account
Last updated:
