Manufacturer

SilentFiber

SilentFiber offers a broad portfolio of sustainable acoustic elements made from natural fibres. The product family ranges from the peat-based SilentRoot acoustic panel through the hemp-based SilentHEMP line to specialty products such as SilentSPA (wet room), SilentMOSS (moss picture) and SilentBEE (hexagon). Owner Dipl. Ing. Robert Schwemmer operates as a brand owner with selected European manufacturing partners. Custom formats and individual cutting are available from the first panel onward (max. 1.2 × 2.4 m). Awards: Green Product Award 2022, Klimaschutzpreis (Climate Protection Prize), Austrian Bauherrenpreis, Green Product Award Finalist 2026.

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EPD Fire protection

SilentFELT bluefiber Acoustic Panel

Name: SilentFELT bluefiber Acoustic Panel
Brand: SilentFiber

EPD availableWallCeilingFree-hanging

Description

The SilentFELT bluefiber Acoustic Panel is a sound absorber made from thermally and mechanically bonded polyester nonwoven, without chemical binders. The rigid panels are used as wall, ceiling and furniture absorbers, the pads as suspended ceiling elements, in grid ceilings or frames.

Technical data

Material: Acoustic panel made from bonded polyester nonwoven (bluefiber)

Surface: matt, porous nonwoven face

Up to fire class: B-s1,d0 to B-s2,d0 per EN 13501-1 (depending on type and colour; free-standing/free-hanging mounting, ≥ 3.1 in clearance). Pad 2 in fire class on request

Application: Office, conference, education and hospitality — wall absorbers, ceiling elements and furniture/screen acoustics

Certifications: EPD per EN 15804+A2 / ISO 14025 (The International EPD® System, EPD-IES-0023981, valid until 21 Oct 2030, third-party verified); OEKO-TEX® STANDARD 100; SVHC-free, no CMR substances (cat. 1A/1B), biocide-free (EPD declaration)

Colours: Panel: warm white, light grey, silver grey, anthracite grey, pure black, desert taupe, stone beige, cotton beige · Pad: white, marble, grey, black

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 11 variants

Choose thickness

NRC

0.50

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.00	0.10	0.30	0.65	0.90	0.95

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	Gap / cavity	Value
3000 g/m²	0 in (direct mounting)	NRC0.50
1000 g/m²	0 in (direct mounting)	NRC0.40
2000 g/m²	0 in (direct mounting)	NRC0.40

Test report: 2.3/20-144-23

NRC: 0.50 (derived from ISO 354 lab data)

Institute: MFPA Leipzig GmbH (DAkkS, DIN EN ISO/IEC 17025, reference number SAC 02)

Measurement date: 2020-07-23

Room volume: 7,875 cu ft

Object area: 137 sq ft

Application: Wall or ceiling mounting

Measured values as a table (11 measurements)

SilentFELT bluefiber Acoustic Panel: 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
12 mm · 1000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.40	0.04	0.03	0.03	0.07	0.10	0.14	0.20	0.27	0.33	0.41	0.49	0.55	0.64	0.67	0.73	0.78	0.85	0.88
12 mm · 2000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.40	0.03	0.02	0.02	0.04	0.07	0.10	0.14	0.22	0.29	0.41	0.53	0.62	0.75	0.81	0.89	0.96	0.98	1.00
12 mm · 3000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.50	0.03	0.02	0.02	0.05	0.09	0.13	0.20	0.30	0.41	0.53	0.66	0.74	0.85	0.87	0.96	0.99	0.98	0.94
25 mm · 2000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.65	0.05	0.05	0.08	0.16	0.23	0.32	0.45	0.56	0.67	0.75	0.80	0.86	0.90	0.94	0.93	0.98	0.96	0.95
25 mm · 3000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.70	0.06	0.06	0.07	0.14	0.23	0.33	0.46	0.60	0.72	0.82	0.89	0.96	1.00	1.00	1.04	1.03	1.02	0.95
25 mm · 4000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.75	0.04	0.07	0.12	0.23	0.32	0.46	0.59	0.75	0.81	0.88	0.95	1.01	0.97	1.03	1.00	0.98	1.00	1.01
25 mm · 4000 g/m² · 200 mm wall standoff · Wall or ceiling mounting with rear ventilation gap	0.90	0.38	0.40	0.54	0.64	0.84	0.89	0.89	0.95	0.92	0.86	0.90	0.96	0.96	0.98	1.00	1.02	1.02	0.95
40 mm · 3000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.80	0.10	0.11	0.17	0.32	0.44	0.61	0.71	0.81	0.89	0.92	0.96	0.98	1.00	1.02	1.04	1.04	1.08	1.06
40 mm · 4000 g/m² · 0 mm (direct mounting) · Wall or ceiling mounting	0.85	0.11	0.14	0.20	0.35	0.52	0.66	0.81	0.90	0.95	1.00	1.01	1.01	1.04	1.04	1.05	1.07	1.08	1.11
50 mm · 0 mm (direct mounting) · Suspended ceiling element or frame mounting · Anthracite/black	0.90	0.13	0.21	0.29	0.48	0.68	0.77	0.86	0.91	0.94	1.03	0.98	0.98	0.97	1.03	1.03	1.01	1.04	1.07
50 mm · 0 mm (direct mounting) · Suspended ceiling element or frame mounting · White	0.90	0.15	0.19	0.28	0.49	0.65	0.77	0.92	0.97	0.99	1.03	1.03	1.05	1.04	1.03	1.06	1.01	1.06	1.07

Measured values as a table (11 measurements)

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Last updated: 09/14/2026