Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Fibertex R4
Original description
Duct liner, perforated foil facing
ISO 354 – reverberation chamber· 2 variants
αp per ISO 11654
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| Compare | Value | |
|---|---|---|
| 50 mm | αw0.83 | |
| 25 mm | αw0.60 |
Weight / density: 3.0 kg / m²
Dimensions: 120 x 150 cm
Distance: 0
