MAkustik MA01 acoustic panel, 6 mm perforation, 11% open area, spacing 320 mm

Type 6/16 – MAkustik MA01 straight-drilled perforation

PTB reference data

Original description

Material properties

Manufacturer: MAkustik

Thickness: 46 mm

Wall distance: 320 mm

Perforation: 11%

Hole size: 6 mm

Backing: 30 mm mineral wool

ISO 354 – reverberation chamber

α_w

0.50

α_p nach ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.55	0.70	0.80	0.70	0.45	0.40

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Value from the PTB table, not verified

Measured values as a table (1 measurement)

MAkustik MA01 acoustic panel, 6 mm perforation, 11% open area, spacing 320 mm: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	α_w	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	0.50	0.44	0.60	0.67	0.61	0.74	0.75	0.75	0.76	0.83	0.76	0.74	0.60	0.52	0.45	0.40	0.38	0.37	0.39

Measured values as a table (1 measurement)

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Last updated: 02/09/2026