TextileHigh-frequency absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: DNA 1968, Tabelle a3.1-1
Coconut fiber roll felt, 29 mm, raw paper backed
PTB reference data
Original description
Coconut fiber roll felt, 29 mm, raw paper backed
Material properties
Thickness: 29 mm
Surface weight: 2.2 kg/m²
Backing: raw paper faced
Flow resistance: 0.002 kPa·s/m²
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.31
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.15 | 0.20 | 0.35 | 0.50 | 0.55 |
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Method (354): Measured