Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA 1968, Tabelle a3.2-4
Value from the PTB table, not verified
Mineral fiber panel, bonded, surface-treated, 50 mm, 120 Rayl/cm, no spacing
PTB reference data
Original description
Mineral fiber panel, bonded, surface-treated, 50 mm, 120 Rayl/cm, no spacing
Material properties
Thickness: 2 in
Surface weight: 6.0 kg/m²
Density: 120 kg/m³
Flow resistance: 120 kPa·s/m²
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.95
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.65 | 1.00 | 1.00 | 1.00 | 0.95 |
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Value from the PTB table, not verified
NRC: 0.95 (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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 50 mm · 120 kg/m^3, 6,0 kg/m^2 · oberflächenimprägniert | 0.95 | 0.23 | 0.40 | 0.72 | 0.83 | 0.93 | 1.04 | 1.08 | 1.08 | 1.05 | 1.05 | 1.05 | 1.01 | 1.01 | 0.98 | 0.98 | 0.93 |
Measured values as a table (1 measurement)
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