Name: Micro-perforated acrylic glass sound absorber
Creator: Physikalisch-Technische Bundesanstalt (PTB)

Micro-perforated acrylic glass sound absorber – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

ISO 354 – reverberation chamber· 4 variants

αw

0.43

αp per ISO 11654

125 Hz

0.25

250 Hz

0.60

500 Hz

0.85

1000 Hz

0.50

2000 Hz

0.25

4000 Hz

0.15

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		Value
100 mm	Lochdurchmesser 0,55 mm, Lochabstand 3,5 mm	αw0.43
100 mm	Lochdurchmesser 0,8 mm, Lochabstand 6 mm, Lochflächenanteil 0,0140 %	αw0.29
50 mm	Lochdurchmesser 0,55 mm, Lochabstand 3,5 mm, Lochflächenanteil 0,0207%	αw0.26
25 mm	Lochdurchmesser 0,65 mm, Lochabstand 4 mm, Lochflächenanteil 0,0314 %	αw0.25

Micro-perforated acrylic glass sound absorber

Material properties