TextileBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA-Tabelle 1968 a 6-1
Loop pile carpet on felt underlay with waffle structure
PTB reference data
Original description
Loop pile carpet on felt underlay with waffle structure
Material properties
Thickness: 4.5 mm (carpet), 8 mm (felt underlay)
Surface weight: 1.87 kg/m² (carpet), 1.38 kg/m² (felt underlay)
Surface: waffle structure
Mounting: laid on felt underlay
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.27
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.20 | 0.55 | 0.25 | 0.30 | 0.35 |
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Method (354): Measured