MAkustik MA04 acoustic panel with slots and mineral wool

Type 9/2 – MAkustik MA04 continuously slotted

PTB reference data

Original description

Material properties

Manufacturer: MAkustik

Thickness: 46 mm

Wall distance: 170 mm

Perforation: 18 %

Hole size: 2 mm

Backing: 30 mm mineral wool

ISO 354 – reverberation chamber

αw

0.77

αp nach ISO 11654

125 Hz

0.50

250 Hz

1.05

500 Hz

0.95

1000 Hz

0.85

2000 Hz

0.70

4000 Hz

0.50

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Method (354): Measured