Unperforated metal panel ceiling with Sillan acoustic panels

PTB reference data

Original description

Material properties

Wall distance: 350 mm

Backing: 20 mm thick Sillan acoustic panels

Application: ceiling

ISO 354 – reverberation chamber

αw

0.56

αp nach ISO 11654

125 Hz

0.70

250 Hz

0.80

500 Hz

0.80

1000 Hz

0.60

2000 Hz

0.30

4000 Hz

0.25

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Method (354): Measured