Isolith Akustikplatte G cement-bonded wood wool

Akustikplatte G 25 mm

PTB reference data

Original description

Material properties

Manufacturer: Isolith M. Hattinger Ges.m.b.H.

Thickness: 1 in

Up to fire class: B1

Reverberation chamber (ASTM C423 / ISO 354)

NRC

0.45

derived from ISO 354 lab data

α_p nach ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.15	0.10	0.20	0.55	0.85	0.70

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Value from the PTB table, not verified

NRC: 0.45 (derived from ISO 354 lab data)

Measured values as a table (1 measurement)

Isolith Akustikplatte G cement-bonded wood wool: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz
25 mm · 11 kg / m² · grobe Wollstruktur	0.45	0.13	0.11	0.22	0.54	0.85	0.71

Measured values as a table (1 measurement)

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Last updated: 08/28/2026