Name: Knauf Perllit sound absorber panel No. 73
Creator: Physikalisch-Technische Bundesanstalt (PTB)

Knauf Perllit sound absorber panel No. 73 – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

ISO 354 – reverberation chamber· 2 variants

αw

0.34

αp per ISO 11654

125 Hz

0.25

250 Hz

0.70

500 Hz

0.60

1000 Hz

0.30

2000 Hz

0.15

4000 Hz

0.05

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Compare		Value
	50 mm	αw0.34
	500 mm	αw0.34

Weight / density: ca. 14 kg / m²

Dimensions: 625 x 625 mm

Knauf Perllit sound absorber panel No. 73

Material properties