OtherBroadband absorber
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: RAMSETE
Davidson (impedance tube)
PTB reference data
Original description
Davidson (impedance tube)
Material properties
Thickness: 20 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.28
Frequency values
αp nach ISO 11654
| f (Hz) | 63 | 125 | 250 | 500 | 1k | 2k |
|---|---|---|---|---|---|---|
| αp | 0.00 | 0.10 | 0.20 | 0.45 | 0.50 | 0.30 |
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Method (354): Measured