Perforated brick with mineral fiber mat backing

PTB reference data

Original description

Material properties

Thickness: 60 mm

Wall distance: 200 mm

Dimensions: 240 × 240 × 60 mm

Perforation: 40%

Hole size: 10.5 × 10.5 mm

Backing: 2 layers of mineral fiber mats quilted on wire mesh

ISO 354 – reverberation chamber

αw

0.94

αp nach ISO 11654

125 Hz

0.80

250 Hz

1.10

500 Hz

1.05

1000 Hz

0.95

2000 Hz

1.05

4000 Hz

0.90

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Method (354): Measured