Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Harris:Handbook of Acoustical Measurements and Noise Control, McGraw Hill 1991
Value from the PTB table, not verified
Fiberglass boards and blankets, 25.4 mm glass wool, 24 to 48 kg/m², thickness 25,4 mm
PTB reference data
Original description
Fiberglass boards and blankets, 25.4 mm glass wool, 24 to 48 kg/m², thickness 25,4 mm
Material properties
Thickness: 1 in
Density: 24 kg/m², 48 kg/m²
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.65
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.25 | 0.65 | 0.85 | 0.80 | 0.75 |
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Value from the PTB table, not verified
NRC: 0.65 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 25,4 mm | 0.65 | 0.08 | 0.25 | 0.65 | 0.85 | 0.80 | 0.75 |
Measured values as a table (1 measurement)
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