Knauf D 127 acoustic design panel, perforated drywall, 8/15/20 R, 9.9% – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

ISO 354 – reverberation chamber· 2 variants

αw

0.52

αp per ISO 11654

125 Hz

0.65

250 Hz

0.80

500 Hz

0.60

1000 Hz

0.50

2000 Hz

0.35

4000 Hz

0.30

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Compare		Value
	400 mm	αw0.52
	60 mm	αw0.46

Weight / density: <15 kg / m²

Dimensions: 1200 mm x 1875/2500 mm

Knauf D 127 acoustic design panel, perforated drywall, 8/15/20 R, 9.9%

Material properties