Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Flumroc 341 stone wool roof insulation board
341
PTB reference data
Original description
Flumroc 341 stone wool roof insulation board
Material properties
Manufacturer: Flumroc A.G.
Thickness: 2.4 in, 3.1 in, 3.9 in
Wall distance: 0 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)· 3 variants
NRC
0.80
Frequency values
αp per octave band
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.50 | 0.65 | 0.80 | 0.90 | 0.90 | 0.95 |
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| Compare | Value | ||
|---|---|---|---|
| 3.1 in | 13.2 kg / m² | NRC0.80 | |
| 2.4 in | 9.9 kg / m² | NRC0.75 | |
| 3.9 in | 16.5 kg / m² | NRC0.75 |
NRC: 0.80 (derived from ISO 354 lab data)
Dimensions: 24 in x 39 in
Distance: 0
Measured values as a table (3 measurements)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 60 mm · 9.9 kg / m² · 0 | 0.75 | 0.40 | 0.66 | 0.73 | 0.81 | 0.85 | 0.91 |
| 80 mm · 13.2 kg / m² · 0 | 0.80 | 0.49 | 0.66 | 0.78 | 0.89 | 0.92 | 0.97 |
| 100 mm · 16.5 kg / m² · 0 | 0.75 | 0.47 | 0.59 | 0.72 | 0.81 | 0.86 | 0.89 |
Measured values as a table (3 measurements)
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