WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer's product sheet
Value from the PTB table, not verified
n'H Akustik + Design Topakustik 12/4 HR wood absorber
Topakustik – 12/4 HR
PTB reference data
Original description
n'H Akustik + Design Topakustik 12/4 HR wood absorber
Material properties
Manufacturer: n'H Akustik + Design AG
Wall distance: 200 mm
Density: 60 kg/m³
Perforation: 15 %
Backing: 30 mm mineral wool
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.80
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.30 | 0.80 | 0.95 | 1.00 | 0.80 | 0.65 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 200 mm | 0.80 | 0.31 | 0.80 | 0.96 | 1.02 | 0.78 | 0.64 |
Measured values as a table (1 measurement)
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