WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data
Value from the PTB table, not verified
MAkustik MA02 acoustic panel, 3/10 mm stepped perforation, 3% open area (series 5)
Type 3/16 – MAkustik MA02 stepped perforation
PTB reference data
Original description
MAkustik MA02 acoustic panel, 3/10 mm stepped perforation, 3% open area (series 5)
Material properties
Manufacturer: MAkustik
Thickness: 46 mm
Wall distance: 320 mm
Perforation: 3%
Hole size: 3/10 mm
Backing: 30 mm mineral wool
Surface: non-woven faced
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.35
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.55 | 0.70 | 0.80 | 0.60 | 0.35 | 0.15 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 100 Hz | 125 Hz | 160 Hz | 200 Hz | 250 Hz | 315 Hz | 400 Hz | 500 Hz | 630 Hz | 800 Hz | 1000 Hz | 1250 Hz | 1600 Hz | 2000 Hz | 2500 Hz | 3150 Hz | 4000 Hz | 5000 Hz |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 46 mm · 320 mm | 0.35 | 0.43 | 0.54 | 0.66 | 0.62 | 0.74 | 0.80 | 0.77 | 0.78 | 0.81 | 0.70 | 0.60 | 0.44 | 0.38 | 0.33 | 0.28 | 0.22 | 0.17 | 0.11 |
Measured values as a table (1 measurement)
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