WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data: www. Isolith.com
Value from the PTB table, not verified
Isolith BABf sound absorber panel
Sound absorber panel – BABf 50 mm
PTB reference data
Original description
Isolith BABf sound absorber panel
Material properties
Manufacturer: Isolith M. Hattinger Ges.m.b.H.
Thickness: 2 in
Backing: mineral wool core
Surface: cement-bonded wood wool coating on both sides
Up to fire class: B1, Q1, Tr1
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.90
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.15 | 0.50 | 0.90 | 1.00 | 1.00 | 0.95 |
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Value from the PTB table, not verified
NRC: 0.90 (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 · 12 kg / m² · feine Wollstruktur | 0.90 | 0.16 | 0.52 | 0.91 | 1.06 | 1.07 | 0.97 |
Measured values as a table (1 measurement)
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