WoodHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: Manufacturer data
Value from the PTB table, not verified
MAkustik MA20 veneered acoustic panel Type 1/3, 1 mm hole, 9% open area, spacing 0 mm
Type 1/3 – Makustik MA20 veneered acoustic panel
PTB reference data
Original description
MAkustik MA20 veneered acoustic panel Type 1/3, 1 mm hole, 9% open area, spacing 0 mm
Material properties
Manufacturer: MAkustik
Thickness: 0.8 in
Wall distance: 0 in
Perforation: 9%
Hole size: 0 in
Measurement data
Sound absorption
Reverberation chamber (ASTM C423 / ISO 354)
NRC
0.50
derived from ISO 354 lab data
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.05 | 0.10 | 0.40 | 0.85 | 0.70 | 0.45 |
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Value from the PTB table, not verified
NRC: 0.50 (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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 mm · 0 | 0.50 | 0.02 | 0.02 | 0.05 | 0.08 | 0.11 | 0.18 | 0.23 | 0.39 | 0.55 | 0.76 | 0.88 | 0.88 | 0.79 | 0.67 | 0.59 | 0.51 | 0.39 | 0.44 |
Measured values as a table (1 measurement)
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