Siegfried Keller Idikell M textile fiber absorber – PTB – Physikalisch-Technische Bundesanstalt | Acoustic Index

ISO 354 – reverberation chamber· 2 variants

αw

0.51

αp per ISO 11654

250 Hz

0.25

500 Hz

0.65

1000 Hz

0.85

2000 Hz

0.55

4000 Hz

0.35

Create a permanent free account — Access frequency bands, variants and export.

Free. No password required.

Compare		Value
	20 mm	αw0.51
	10 mm	αw0.50

Weight / density: 40 - 60 kg / m³

Distance: 0, with gelochter Folienabdeckung 4 % Lochanteil

Siegfried Keller Idikell M textile fiber absorber

Material properties