Needle felt 5 mm stuck to concrete

PTB reference data

Original description

Material properties

Thickness: 5 mm

Mounting: stuck to concrete

ISO 354 – reverberation chamber

αw

0.16

αp nach ISO 11654

125 Hz

0.00

250 Hz

0.00

500 Hz

0.00

1000 Hz

0.05

2000 Hz

0.10

4000 Hz

0.15

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Method (354): Measured