illbruck illsonic waterproof PE foam waffle structure

illsonic waterproof waffle structure

PTB reference data

Original description

Material properties

Manufacturer: illbruck GmbH

Thickness: 50 mm

Wall distance: 0 mm

ISO 354 – reverberation chamber

αw

0.76

αp nach ISO 11654

125 Hz

0.15

250 Hz

0.35

500 Hz

0.80

1000 Hz

1.10

2000 Hz

1.00

4000 Hz

1.05

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Method (354): Measured