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, spacing 380 mm
Type 1/3 – Makustik MA20 veneered acoustic panel
PTB reference data
Original description
MAkustik MA20 veneered acoustic panel Type 1/3, spacing 380 mm
Material properties
Manufacturer: MAkustik
Thickness: 20 mm
Wall distance: 380 mm
Perforation: 9%
Hole size: 1 mm
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.55
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.55 | 0.60 | 0.50 | 0.55 | 0.70 | 0.50 |
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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 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 20 mm · 380 mm | 0.55 | 0.46 | 0.62 | 0.52 | 0.64 | 0.57 | 0.52 | 0.50 | 0.46 | 0.51 | 0.50 | 0.56 | 0.60 | 0.72 | 0.74 | 0.67 | 0.55 | 0.49 | 0.46 |
Measured values as a table (1 measurement)
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