Carpet, loop pile, on felt underlay

PTB reference data

Original description

Material properties

Thickness: 5.3 mm

Surface weight: 1.98 kg/m²

Backing: felt underlay

Surface: waffle structure

ISO 354 – reverberation chamber

αw

0.47

αp nach ISO 11654

125 Hz

0.05

250 Hz

0.10

500 Hz

0.30

1000 Hz

0.70

2000 Hz

0.90

4000 Hz

0.75

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Method (354): Measured