WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data
Value from the PTB table, not verified
MAkustik MA02 acoustic panel with stepped perforation (series 2)
Typ 8/16 – MAkustik MA02 Stufenbohrung
PTB reference data
Original description
MAkustik MA02 acoustic panel with stepped perforation (series 2)
Material properties
Manufacturer: MAkustik
Thickness: 1.8 in
Wall distance: 6.7 in
Perforation: 20 %
Hole size: 8/0.5 in
Backing: acoustic non-woven, 1.2 in mineral wool
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.90
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.35 | 0.85 | 0.95 | 0.90 | 0.90 | 1.00 |
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Value from the PTB table, not verified
NRC: 0.90 (derived from ISO 354 lab data)
Measured values as a table (1 measurement)
| Build-up | NRC | 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 · 170 mm | 0.90 | 0.27 | 0.30 | 0.55 | 0.68 | 0.84 | 0.98 | 0.95 | 0.96 | 0.98 | 0.91 | 0.89 | 0.92 | 0.93 | 0.91 | 0.92 | 0.94 | 1.03 | 1.01 |
Measured values as a table (1 measurement)
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