Perforated brick, 40% perforation ratio

PTB reference data

Original description

Material properties

Thickness: 60 mm

Wall distance: 200 mm

Dimensions: 240 x 240 x 60 mm

Perforation: 40%

Hole size: 10.5 x 10.5 mm

ISO 354 – reverberation chamber

αw

0.18

αp nach ISO 11654

125 Hz

0.10

250 Hz

0.15

500 Hz

0.15

1000 Hz

0.15

2000 Hz

0.25

4000 Hz

0.25

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Method (354): Measured