WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer's product sheet
Value from the PTB table, not verified
Topakustik 5/3 T fiber absorber, grooved and perforated
Topakustik – 5/3 T
PTB reference data
Original description
Topakustik 5/3 T fiber absorber, grooved and perforated
Material properties
Manufacturer: n'H Akustik + Design AG
Wall distance: 200 mm
Density: 60 kg/m³
Perforation: 3% / 31%
Backing: 30 mm mineral wool absorber
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.65
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.55 | 0.90 | 1.00 | 0.90 | 0.75 | 0.45 |
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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 | 0.65 | 0.55 | 0.92 | 1.03 | 0.91 | 0.73 | 0.43 |
Measured values as a table (1 measurement)
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