WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer's product sheet
Value from the PTB table, not verified
Topperfo 16/16/6 perforated panel with mineral wool absorber
Topperfo – 16/16/6
PTB reference data
Original description
Topperfo 16/16/6 perforated panel with mineral wool absorber
Material properties
Manufacturer: n'H Akustik + Design AG
Wall distance: 200 mm
Perforation: 11%
Hole size: 6 mm
Backing: 30 mm mineral wool absorber
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.50
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.90 | 0.95 | 0.75 | 0.50 | 0.35 |
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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 | 0.50 | 0.65 | 0.92 | 0.96 | 0.76 | 0.49 | 0.36 |
Measured values as a table (1 measurement)
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