50 mm mineral wool (70 kg/m³) 300 mm in front of wall

PTB reference data

Original description

Material properties

Thickness: 50 mm

Wall distance: 300 mm

Density: 70 kg/m³

ISO 354 – reverberation chamber

αw

0.63

αp nach ISO 11654

125 Hz

0.25

250 Hz

0.15

500 Hz

0.20

1000 Hz

0.20

2000 Hz

0.25

4000 Hz

0.20

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Method (354): Measured