Ecophon Focus L-line glass wool panel with Akutex T surface

Ecophon – Focus L-line

PTB reference data

Original description

Material properties

Manufacturer: Ecophon GmbH

Thickness: 0.8 in

Wall distance: 7.9 in

Reverberation chamber (ASTM C423 / ISO 354)

NRC

0.85

derived from ISO 354 lab data

α_p nach ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.45	0.80	0.85	0.85	0.95	0.95

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Value from the PTB table, not verified

NRC: 0.85 (derived from ISO 354 lab data)

Measured values as a table (1 measurement)

Ecophon Focus L-line glass wool panel with Akutex T surface: 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
20 mm · ca. 5 kg / m² incl. Unterkonstruktion at horizontaler Montage, ca. 17 kg / m² incl. Unterkonstruktion at vertikaler Montage · tKh = 200 mm (totale Konstruktionshöhe) · Deckenelement, zur Überwindung von Unterschieden in der Deckenhöhe, Höhenunterschied 150 mm or 600 mm each nach Montageart · Akutex T	0.85	0.45	0.80	0.85	0.85	0.95	0.95

Measured values as a table (1 measurement)

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Last updated: 09/02/2026