n'H Akustik Topperfo perforated panel with fiber absorber

Topperfo – 16/16/12-2

PTB reference data

Original description

Material properties

Manufacturer: n'H Akustik + Design AG

Wall distance: 200 mm

Perforation: 15 % / 44 %

Hole size: 12 mm rear and 2 mm front

Backing: acoustic non-woven 60 g/m²

ISO 354 – reverberation chamber

αw

0.49

αp nach ISO 11654

125 Hz

0.60

250 Hz

0.85

500 Hz

0.70

1000 Hz

0.50

2000 Hz

0.20

4000 Hz

0.10

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Method (354): Measured