Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA 1968, Tabelle a3.2-9
Value from the PTB table, not verified
Mineral fiber panel, surface-treated on both sides, 20 mm
PTB reference data
Original description
Mineral fiber panel, surface-treated on both sides, 20 mm
Material properties
Thickness: 0.8 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.60
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.20 | 0.50 | 0.80 | 0.90 | 0.95 |
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Value from the PTB table, not verified
NRC: 0.60 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 mm · 117 kg/m^3, 2,34 kg/m^2 · oberflächenimprägniert | 0.60 | 0.08 | 0.12 | 0.16 | 0.25 | 0.40 | 0.52 | 0.63 | 0.72 | 0.80 | 0.82 | 0.93 | 0.89 | 0.89 | 0.92 | 0.99 | 0.90 |
Measured values as a table (1 measurement)
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