Polyklet acoustic perforated brick with Sillan panels

PTB reference data

Original description

Material properties

Wall distance: 50 mm

Perforation: approx. 43%

Backing: 30 mm Sillan acoustic panels

ISO 354 – reverberation chamber

αw

0.58

αp nach ISO 11654

125 Hz

0.25

250 Hz

0.40

500 Hz

0.60

1000 Hz

0.80

2000 Hz

0.80

4000 Hz

0.70

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Method (354): Measured