MUTE+ cover wall absorber

Name: MUTE+ cover wall absorber
Brand: Lindner Group

α_w 0.90–0.95Absorber class A

Wall

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Manufacturer

Lindner Group

Lindner Group, Arnstorf: metal ceilings, heating and cooling ceilings, raised floors, wall and ceiling linings and the MUTE+ sound absorber line.

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Documents

Datasheet acoustic insert Calma Datasheet MUTE+ cover S45/S60-W

Description

Wall absorber with an aluminium frame, fabric covering of polyester or wool and an additional acoustic insert. Free of mineral fibres and allergy-friendly, 100 percent recyclable and reusable. The frame sits concealed behind the covering.

Technical data

Material: Aluminium frame, covering of polyester or wool

Surface: Fabric covering wrapped over the edge

Up to fire class: B1 · per DIN 4102, wool covering B2

Certifications: Oeko-Tex Standard 100 (S24-3191, Hohenstein HTTI), Indoor Air Comfort GOLD, emission class A+ (VOC, France)

Colours: 20 standard colours, covering of polyester or wool

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 8 variants

α_w

0.95

Frequency values

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			Value
60 mm	—	plane absorber	α_w0.95
45 mm	—	plane absorber	α_w0.90
45 mm	53 mm	absorber 2000 x 1000 mm	A_obj1.90m²
60 mm	68 mm	absorber 2000 x 1000 mm	A_obj1.90m²
60 mm	68 mm	absorber 1500 x 1000 mm	A_obj1.50m²
45 mm	53 mm	absorber 1500 x 1000 mm	A_obj1.40m²
45 mm	53 mm	absorber 1000 x 1000 mm	A_obj1.00m²
60 mm	68 mm	absorber 1000 x 1000 mm	A_obj1.00m²

Absorber class: A

Test report: H220914M1/11g_rev00

Object area: 10.5 m²

Absorber: 25 mm Calma

Test setup: plane absorber

Measured values as a table (8 measurements)

MUTE+ cover wall absorber: sound absorption coefficient αs per ISO 354 by frequency and test build-up
Build-up	α_w	Absorber class	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
45 mm · plane absorber	0.90	A	0.08	0.12	0.29	0.51	0.68	0.88	0.94	0.95	0.97	0.91	0.90	0.86	0.85	0.84	0.84	0.84	0.81	0.83
45 mm · 53 mm · absorber 1500 x 1000 mm (A_obj, m²)	–	–	0.10	0.10	0.40	0.80	1.00	1.40	1.70	1.80	1.60	1.50	1.40	1.30	1.40	1.30	1.30	1.30	1.30	1.20
45 mm · 53 mm · absorber 2000 x 1000 mm (A_obj, m²)	–	–	0.10	0.20	0.50	1.00	1.40	1.90	2.20	2.30	2.20	2.00	1.90	1.80	1.80	1.70	1.90	1.90	1.90	1.80
45 mm · 53 mm · absorber 1000 x 1000 mm (A_obj, m²)	–	–	0.10	0.10	0.30	0.60	0.70	0.90	1.10	1.20	1.20	1.10	1.00	0.90	0.90	0.80	0.90	0.90	0.90	0.90
60 mm · 68 mm · absorber 1000 x 1000 mm (A_obj, m²)	–	–	0.10	0.10	0.40	0.70	0.90	1.00	1.20	1.20	1.10	1.00	1.00	0.90	0.90	0.90	0.90	0.80	0.90	0.80
60 mm · 68 mm · absorber 1500 x 1000 mm (A_obj, m²)	–	–	0.10	0.10	0.40	1.00	1.30	1.60	1.80	1.70	1.70	1.60	1.50	1.40	1.40	1.40	1.40	1.40	1.40	1.40
60 mm · 68 mm · absorber 2000 x 1000 mm (A_obj, m²)	–	–	0.10	0.20	0.50	1.20	1.50	2.00	2.20	2.30	2.20	2.10	1.90	1.90	1.80	1.80	1.80	1.80	1.80	1.70
60 mm · plane absorber	0.95	A	0.10	0.15	0.37	0.61	0.81	0.95	0.98	0.95	0.98	0.93	0.96	0.89	0.93	0.91	0.89	0.90	0.83	0.84

Measured values as a table (8 measurements)

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Last updated: 04/11/2026

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