Manufacturer

Fural Systeme in Metall GmbH

Fural manufactures modular metal ceiling systems with outstanding acoustic performance. Every metal ceiling is an acoustic ceiling with additional functions such as fire protection, cooling, heating, hygiene or impact resistance. Certified to TAIM, with EPDs available for steel and aluminium systems.

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EPD

Fural L-Absorber

Name: Fural L-Absorber
Brand: Fural Systeme in Metall GmbH

L-Absorber

EPD availableWall

Description

L-shaped wall absorber element for mounting on a substructure. The perforated metal surface is combined with a mineral wool or sheep's wool layer. Targeted retrofit room-acoustics optimization, also for refurbishment of existing buildings. 12 tested configurations.

Technical data

Material: galvanized steel

Surface: RAL 9010, powder coating 60–70 μm

Up to fire class: A1 (DIN EN 13501-1)

Application: L-Absorber

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 12 variants

Size

NRC

0.70

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.50	0.70	0.75	0.75	0.65	0.65

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Perforation	Size	Value
Rg 2,5-16%	3.9 in Aufbau	NRC0.70
Rg 2,5-16%	7.9 in Aufbau	NRC0.70
Rg 2,5-16%	5.9 in Aufbau	NRC0.70
Rg 2,5-16%	7.9 in Aufbau	NRC0.70
Rg 2,5-16%	3.9 in Aufbau	NRC0.70
Rg 0,7-4%	3.9 in Aufbau	NRC0.70
Rg 0,7-4%	5.9 in Aufbau	NRC0.65
Rg 0,7-4%	7.9 in Aufbau	NRC0.65
Rg 0,7-4%	7.9 in Aufbau	NRC0.65

Test report: M 105629/32 (Aufbau 10)

NRC: 0.70 (derived from ISO 354 lab data)

Institute: MFPA Leipzig

Dimensions: 3.9 in total height

Application: 2.4 in sheep wool 20 kg/m³

Measured values as a table (12 measurements)

Fural L-Absorber: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	NRC	100 Hz	125 Hz	160 Hz	200 Hz	250 Hz	315 Hz	400 Hz	500 Hz	630 Hz	800 Hz	1000 Hz	1250 Hz	1600 Hz	2000 Hz	2500 Hz	3150 Hz	4000 Hz	5000 Hz
Rg 0,7-4% · 100 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.32	0.40	0.52	0.56	0.67	0.70	0.74	0.76	0.73	0.72	0.69	0.62	0.59	0.63	0.62	0.57	0.54	0.51
Rg 2,5-16% · 100 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.39	0.48	0.56	0.65	0.71	0.73	0.75	0.76	0.75	0.76	0.74	0.70	0.64	0.64	0.67	0.65	0.63	0.62
Rg 2,5-16% · 150 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.39	0.47	0.57	0.67	0.71	0.73	0.75	0.77	0.75	0.75	0.71	0.68	0.66	0.65	0.67	0.66	0.64	0.62
Rg 2,5-16% · 200 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.39	0.50	0.58	0.69	0.71	0.72	0.75	0.76	0.74	0.73	0.69	0.71	0.65	0.65	0.68	0.66	0.64	0.63
Rg 0,7-4% · 150 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.65	0.33	0.40	0.52	0.56	0.67	0.71	0.73	0.74	0.73	0.69	0.64	0.62	0.61	0.62	0.63	0.57	0.55	0.52
Rg 0,7-4% · 200 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.65	0.32	0.39	0.52	0.59	0.67	0.69	0.71	0.71	0.70	0.66	0.64	0.62	0.60	0.63	0.62	0.58	0.54	0.51
Rg 0,7-4% · 100 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.32	0.36	0.49	0.57	0.65	0.68	0.73	0.75	0.74	0.74	0.71	0.64	0.60	0.63	0.63	0.57	0.55	0.50
Rg 0,7-4% · 150 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.29	0.36	0.49	0.58	0.65	0.67	0.73	0.75	0.74	0.71	0.67	0.64	0.61	0.63	0.63	0.58	0.56	0.52
Rg 0,7-4% · 200 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.65	0.32	0.39	0.50	0.60	0.65	0.67	0.72	0.74	0.72	0.69	0.67	0.65	0.60	0.63	0.63	0.58	0.56	0.52
Rg 2,5-16% · 100 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.39	0.43	0.58	0.65	0.75	0.74	0.77	0.75	0.74	0.73	0.71	0.68	0.63	0.62	0.66	0.64	0.63	0.62
Rg 2,5-16% · 150 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.39	0.47	0.59	0.67	0.75	0.75	0.77	0.74	0.73	0.71	0.68	0.66	0.65	0.63	0.66	0.64	0.63	0.62
Rg 2,5-16% · 200 mm Aufbau · 60 mm sheep wool 20 kg/m³ · fleece	0.70	0.40	0.53	0.61	0.69	0.75	0.74	0.75	0.73	0.71	0.67	0.66	0.67	0.63	0.64	0.67	0.65	0.62	0.60

Measured values as a table (12 measurements)

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Last updated: 09/13/2026