Topperfo 16/16/8 perforated panel with mineral wool

Topperfo – 16/16/8

PTB reference data

Original description

Material properties

Manufacturer: n'H Akustik + Design AG

Wall distance: 200 mm

Perforation: 19%

Hole size: 8 mm

Backing: 30 mm mineral wool

ISO 354 – reverberation chamber

αw

0.80

αp nach ISO 11654

125 Hz

0.60

250 Hz

0.95

500 Hz

1.00

1000 Hz

0.90

2000 Hz

0.75

4000 Hz

0.60

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Method (354): Measured