Manufacturer

B11

B11 develops and manufactures lightweight, free-standing and suspended room-acoustic objects in Edling, Bavaria. Founded in 2011 by Dirk Huber, the brand stands for distinctive, design-led acoustic solutions „made in Bavaria“. The core range is based on melamine resin foam (Basotect) with a textile cover (Camira Nexus/Lucia): the TOWER OF SILENCE acoustic column, the CUBE, the square WING, the rotatable ROTARY WALL and the suspended FLYING WALL room divider. B11 also offers a PET line made from recycled ARCHISONIC Felt (Impact Acoustic) and the through-dyed WING UNICOLOR. Sound absorption is documented per product — via accredited measurements (Müller-BBM, University of Stuttgart) or manufacturer data sheets; free-standing single objects as the equivalent absorption area A per object.

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Documents

EPD Fire protection

B11 Archisonic Felt

Name: B11 Archisonic Felt
Brand: B11

Archisonic Felt

EPD availableWallCeilingFree-hanging

Description

ARCHISONIC FELT is B11's sustainable PET platform — an acoustic felt of recycled polyester used as wall lining, ceiling surface or free form. It combines tangible acoustics with a warm, textile feel and a considered circular footprint from fibre to disassembly.

Technical data

Material: Recycled polyester acoustic felt (ARCHISONIC Felt)

Surface: Felt surface, milled cut patterns available

Up to fire class: B-s1,d0 — ARCHISONIC Felt — 24 mm tested: B-s1,d0 (EN 13501-1)

Application: Wall and ceiling linings, acoustic surfaces, custom forms

Certifications: EPD (EN 15804), Cradle-to-Cradle, EcoBau; colour fastness class 6 (ISO 105-B02)

Colours: 36 standard colours (ARCHISONIC Felt, Colour Hive)

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 11 variants

Choose thickness

α_w

1.00

Frequency values

α_p per ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.30	0.85	1.00	1.00	1.00	1.00

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Compare		Value
	with 40 mm insulation	α_w1.00
	with 50 mm insulation	α_w0.80
	with 50 mm cavity	α_w0.50
	mounted directly (without cavity)	α_w0.30

Institute: University of Stuttgart, Institute for Acoustics and Building Physics (IABP)

Measured values as a table (11 measurements)

B11 Archisonic Felt: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	α_w	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
24 mm · mounted directly (without cavity)	0.55	0.10	0.02	0.08	0.18	0.22	0.32	0.44	0.54	0.68	0.82	0.95	1.00	1.03	1.10	1.09	1.09	1.09	1.14
24 mm · with 40 mm insulation	0.80	–	0.45	–	–	0.70	–	–	0.90	–	–	0.95	–	–	0.95	–	–	0.95	–
24 mm · with 50 mm insulation	1.00	–	0.40	–	–	0.90	–	–	1.00	–	–	1.00	–	–	1.00	–	–	1.00	–
24 mm · with 50 mm cavity	0.65	0.19	0.09	0.14	0.25	0.37	0.48	0.62	0.78	0.89	0.94	1.03	1.01	1.00	0.99	0.99	1.02	1.04	1.06
24 mm · with 100 mm cavity	0.90	0.19	0.21	0.27	0.46	0.71	0.72	0.80	0.88	0.97	0.99	1.02	1.01	0.96	0.96	0.99	1.03	1.06	1.05
24 mm · with 200 mm cavity	0.95	0.43	0.61	0.64	0.80	0.85	0.85	0.89	0.93	0.94	0.93	0.90	0.94	1.00	0.99	1.01	1.04	1.05	1.08
24 mm · with 300 mm cavity	0.95	0.34	0.83	0.97	0.80	0.83	0.88	0.80	0.86	0.82	0.90	1.00	0.92	1.01	1.02	1.02	1.04	1.06	1.06
12 mm · mounted directly (without cavity)	0.30	–	0.05	–	–	0.05	–	–	0.25	–	–	0.55	–	–	0.85	–	–	1.05	–
12 mm · with 40 mm insulation	1.00	–	0.30	–	–	0.85	–	–	1.00	–	–	1.00	–	–	1.00	–	–	1.00	–
12 mm · with 50 mm insulation	0.80	–	0.40	–	–	0.65	–	–	0.85	–	–	0.95	–	–	0.95	–	–	0.95	–
12 mm · with 50 mm cavity	0.50	–	0.05	–	–	0.15	–	–	0.40	–	–	0.70	–	–	0.80	–	–	0.75	–

Measured values as a table (11 measurements)

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Last updated: 16/09/2026