back ceiling TI-Metal holes 2mm + L.M. 30mm

PTB reference data

Original description

Material properties

Hole size: 2 mm

Backing: 30 mm mineral wool

ISO 354 – reverberation chamber

αw

0.77

αp nach ISO 11654

125 Hz

0.25

250 Hz

0.70

500 Hz

0.95

1000 Hz

0.90

2000 Hz

0.95

4000 Hz

0.85

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Method (354): Measured