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 4)
Type 3/16 – MAkustik MA02 stepped perforation
PTB reference data
Original description
MAkustik MA02 Acoustic Panel with stepped perforation (series 4)
Material properties
Manufacturer: MAkustik
Thickness: 1.8 in
Wall distance: 0 in
Perforation: 3%
Hole size: 3/0.4 in
Backing: 1.2 in mineral wool
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.60
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.10 | 0.60 | 1.00 | 0.55 | 0.25 | 0.15 |
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Value from the PTB table, not verified
NRC: 0.60 (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 · 0 | 0.60 | 0.05 | 0.09 | 0.19 | 0.33 | 0.59 | 0.82 | 1.05 | 1.08 | 0.92 | 0.72 | 0.54 | 0.38 | 0.30 | 0.28 | 0.23 | 0.19 | 0.14 | 0.12 |
Measured values as a table (1 measurement)
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