Name: illsonic waffel soft foam sound absorber with waffle structure
Creator: Physikalisch-Technische Bundesanstalt (PTB)

illsonic waffel soft foam sound absorber with waffle structure – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

ISO 354 – reverberation chamber· 2 variants

αw

0.85

αp per ISO 11654

125 Hz

0.25

250 Hz

0.55

500 Hz

0.95

1000 Hz

1.15

2000 Hz

1.05

4000 Hz

1.20

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Compare		Value
	70 mm	αw0.85
	50 mm	αw0.72

illsonic waffel soft foam sound absorber with waffle structure

Material properties