WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Produktblatt des Herstellers
Topakustik 28/4 M grooved and perforated fiber absorber
Topakustik – 28/4 M
PTB reference data
Original description
Topakustik 28/4 M grooved and perforated fiber absorber
Material properties
Manufacturer: n'H Akustik + Design AG
Wall distance: 200 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.69
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.95 | 0.95 | 0.70 | 0.50 | 0.45 |
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Method (354): Measured
