Mineral woolHighly absorbent
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
Bonded mineral fiber panel, 30 mm thick, 50 mm wall distance, spacing 50 mm
PTB reference data
Original description
Bonded mineral fiber panel, 30 mm thick, 50 mm wall distance, spacing 50 mm
Material properties
Thickness: 1.2 in
Wall distance: 2 in
Flow resistance: 12 Rayl/cm
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.85
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|
| αp | 0.75 | 1.00 | 0.90 | 0.80 | 0.85 |
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Value from the PTB table, not verified
NRC: 0.85 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|
| 30 mm · 50 mm | 0.85 | 0.73 | 1.00 | 0.89 | 0.82 | 0.84 |
Measured values as a table (1 measurement)
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