Facing brick masonry, open perpends, 230 x 50 x 55 mm, wall distance 50 mm

PTB reference data

Original description

Material properties

Thickness: 55 mm

Wall distance: 50 mm

ISO 354 – reverberation chamber

αw

0.23

αp nach ISO 11654

125 Hz

0.10

250 Hz

0.30

500 Hz

0.20

1000 Hz

0.15

2000 Hz

0.25

4000 Hz

0.35

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Method (354): Measured