Mineral woolBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: M. Heckl, H.A. Müller: Taschenbuch der Technischen Akustik, Springer 1994
Value from the PTB table, not verified
Mineral fiber panel 20 Rayl/cm, 50 mm thick, 50 mm wall distance, plywood facing
PTB reference data
Original description
Mineral fiber panel 20 Rayl/cm, 50 mm thick, 50 mm wall distance, plywood facing
Material properties
Thickness: 2 in
Wall distance: 2 in
Surface: 0.2 in plywood
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.30
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.40 | 0.55 | 0.30 | 0.20 | 0.10 | 0.10 |
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Value from the PTB table, not verified
NRC: 0.30 (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 |
|---|---|---|---|---|---|---|---|
| 50 mm · 50 mm · Seitlich umschlossenes Prüffeld | 0.30 | 0.40 | 0.53 | 0.29 | 0.18 | 0.11 | 0.11 |
Measured values as a table (1 measurement)
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