Mineral woolHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: H. Lenz, Marktübersicht schallabsorbierende Anordnungen, Ruhr Universität Bochum, 1981, Seite 222
Value from the PTB table, not verified
Optac Softac fiber absorber panel
Softac - panel
PTB reference data
Original description
Optac Softac fiber absorber panel
Material properties
Manufacturer: Optac
Thickness: 50 mm
Wall distance: 30 mm
Backing: 30 mm mineral wool
Surface: polyester non-woven
Up to fire class: not easily flammable
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
0.80
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.20 | 0.50 | 0.90 | 1.00 | 1.00 | 0.95 |
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| Compare | Value | |
|---|---|---|
| 50 mm + 30 mm Mineralwollhinterfütterung | αw0.80 | |
| 50 mm | αw0.40 |
Weight / density: 250 g / Stück
Dimensions: 500 x 500 x 50 mm
Distance: 30 mm
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 | 6300 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 mm · 250 g / Stück · 30 mm | 0.40 | 0.05 | 0.10 | 0.12 | 0.14 | 0.16 | 0.22 | 0.30 | 0.38 | 0.44 | 0.55 | 0.62 | 0.66 | 0.72 | 0.78 | 0.76 | 0.72 | 0.70 | 0.71 | 0.72 |
| 50 mm + 30 mm Mineralwollhinterfütterung · 250 g / Stück · 30 mm | 0.80 | 0.13 | 0.17 | 0.26 | 0.40 | 0.49 | 0.61 | 0.78 | 0.92 | 0.99 | 1.02 | 1.07 | 1.06 | 1.05 | 1.04 | 1.00 | 0.96 | 0.92 | 0.98 | 1.00 |
Measured values as a table (2 measurements)
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