Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Duct liner, perforated foil facing
Fibertex R6
PTB reference data
Original description
Duct liner, perforated foil facing
Material properties
Manufacturer: Bradford Insulation
Thickness: 25 mm, 50 mm
Wall distance: 0 mm
Surface: perforated foil facing
Application: Duct liner
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 2 variants
αw
1.00
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.25 | 0.90 | 1.00 | 1.00 | 1.00 | 0.85 |
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| Compare | Value | ||
|---|---|---|---|
| 50 mm | 3.0 kg / m² | αw1.00 | |
| 25 mm | 1.5 kg / m² | αw0.55 |
Dimensions: 120 x 150 cm
Distance: 0
Measured values as a table (2 measurements)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 25 mm · 1.5 kg / m² · 0 | 0.55 | 0.12 | 0.27 | 0.80 | 1.17 | 1.16 | 0.80 |
| 50 mm · 3.0 kg / m² · 0 | 1.00 | 0.26 | 0.91 | 1.10 | 1.00 | 1.08 | 0.85 |
Measured values as a table (2 measurements)
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