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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Datasheet

MUTE+ frame baffle

Name: MUTE+ frame baffle
Brand: Lindner Group

Description

Baffle made of polyester with fabric covering and visible frame, can be mounted individually or joined into larger modules. Free of mineral fibres and allergy-friendly, recycled content of up to 20 per cent, 100 per cent recyclable and reusable.

Technical data

Material: Polyester, cover fabric of polyester or wool

Surface: fabric covering on both sides in the visible polyester frame

Up to fire class: B1 — per DIN 4102 by component: absorber and polyester cover fabric B1, wool cover fabric B2

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

Colours: Frame in 5 colours, cover fabrics of polyester or wool, 30 colours in the stock range

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 6 variants

α_w

0.90

Frequency values

α_p per ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.55	0.60	0.90	1.00	1.00	1.00

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		Value
600 mm	baffle height 600 mm, axis spacing 200 mm	α_w0.90
600 mm	baffle height 600 mm, axis spacing 300 mm	α_w0.85
300 mm	baffle height 300 mm, axis spacing 200 mm	α_w0.75
300 mm	baffle height 300 mm, axis spacing 300 mm	α_w0.70
600 mm	baffle height 600 mm, axis spacing 600 mm	α_w0.70
300 mm	baffle height 300 mm, axis spacing 600 mm	α_w0.60

Absorber class: A

Test report: H231016P1/4f_rev00

Institute: GiB mbH, Arnstorf

Room volume: 208.5 m³

Object area: 10.8 m²

Measured values as a table (6 measurements)

MUTE+ frame baffle: 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
40 mm · 300 mm · baffle height 300 mm, axis spacing 600 mm	0.60	C	0.17	0.22	0.41	0.50	0.52	0.48	0.46	0.47	0.52	0.62	0.69	0.74	0.76	0.72	0.74	0.74	0.73	0.76
40 mm · 300 mm · baffle height 300 mm, axis spacing 300 mm	0.70	C	0.20	0.31	0.54	0.55	0.56	0.52	0.52	0.59	0.68	0.81	0.93	0.99	1.01	0.96	0.98	0.94	0.93	0.96
40 mm · 300 mm · baffle height 300 mm, axis spacing 200 mm	0.75	C	0.23	0.37	0.66	0.59	0.61	0.54	0.57	0.65	0.79	0.95	1.00	1.06	1.07	1.06	1.06	1.06	1.05	1.06
40 mm · 600 mm · baffle height 600 mm, axis spacing 600 mm	0.70	C	0.32	0.41	0.42	0.43	0.45	0.48	0.65	0.69	0.81	0.88	0.93	0.94	0.93	0.90	0.91	0.91	0.91	0.93
40 mm · 600 mm · baffle height 600 mm, axis spacing 300 mm	0.85	B	0.44	0.54	0.46	0.43	0.52	0.63	0.81	0.81	0.94	0.99	1.05	1.08	1.09	1.06	1.09	1.06	1.06	1.07
40 mm · 600 mm · baffle height 600 mm, axis spacing 200 mm	0.90	A	0.53	0.64	0.51	0.44	0.58	0.74	0.87	0.89	1.00	1.02	1.08	1.09	1.10	1.08	1.11	1.10	1.10	1.12

Measured values as a table (6 measurements)

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Last updated: 14/09/2026