Perforated brick, glazed, with mineral fiber backing

PTB reference data

Original description

Material properties

Thickness: 50 mm

Wall distance: 25 mm

Perforation: 17%

Backing: 10 mm mineral fiber

Surface: glazed

ISO 354 – reverberation chamber

αw

0.34

αp nach ISO 11654

250 Hz

0.15

500 Hz

0.55

1000 Hz

0.45

2000 Hz

0.35

4000 Hz

0.25

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Method (354): Measured