Ecophon Master C/beta glass wool panel

Ecophon – Master C/beta

PTB reference data

Original description

Material properties

Manufacturer: Ecophon GmbH

Thickness: 1.6 in

Wall distance: 1.6 in, 3.9 in, 7.9 in

Reverberation chamber (ASTM C423 / ISO 354)· 3 variants

NRC

0.75

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.30	0.75	0.85	0.70	0.60	0.50

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Compare		Value
	tKh = 1.6 in (totale Konstruktionshöhe)	NRC0.75
	tKh = 3.9 in (totale Konstruktionshöhe)	NRC0.65
	tKh = 7.9 in (totale Konstruktionshöhe)	NRC0.65

NRC: 0.75 (derived from ISO 354 lab data)

Weight / density: ca. 5,5 kg / m²

Dimensions: 600 x 24 in, 625 x 25 in

Application: for gute Akustik and Sprachverständlichkeit, z.B. Schulen, Großraumbüros usw.

Measured values as a table (3 measurements)

Ecophon Master C/beta glass wool panel: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	63 Hz	125 Hz	250 Hz	500 Hz	1000 Hz	2000 Hz	4000 Hz
40 mm · ca. 5,5 kg / m² · tKh = 40 mm (totale Konstruktionshöhe) · for gute Akustik and Sprachverständlichkeit, z.B. Schulen, Großraumbüros usw.	0.75	0.05	0.30	0.75	0.85	0.70	0.60	0.50
40 mm · ca. 5,5 kg / m² · tKh = 100 mm (totale Konstruktionshöhe) · for gute Akustik and Sprachverständlichkeit, z.B. Schulen, Großraumbüros usw.	0.65	0.10	0.45	0.65	0.65	0.70	0.65	0.45
40 mm · ca. 5,5 kg / m² · tKh = 200 mm (totale Konstruktionshöhe) · for gute Akustik and Sprachverständlichkeit, z.B. Schulen, Großraumbüros usw.	0.65	0.25	0.50	0.60	0.55	0.70	0.65	0.45

Measured values as a table (3 measurements)

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Last updated: 09/02/2026