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+ board S24-B Datasheet MUTE+ board S40-B

MUTE+ board baffle

Name: MUTE+ board baffle
Brand: Lindner Group

Description

Baffle of polyester, suspended vertically from the structural ceiling. Free of mineral fibres and allergy-friendly, recycled content of up to 20 percent, 100 percent recyclable and reusable. Baffle height and centre spacing determine the absorption.

Technical data

Material: Polyester

Surface: Gloss level 1 to 5 GU per colour

Up to fire class: B1 — per DIN 4102

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

Colours: white, grey marbled, darkgrey marbled, nightgrey marbled, black, further polyester colours on request

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 27 variants

NRC

0.90

Frequency values

α_p per octave band

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
1.6 in	24 in	baffle height 24 in, axis spacing 7.9 in	NRC0.90
1.6 in	24 in	baffle height 24 in, axis spacing 12 in	NRC0.85
1.6 in	12 in	baffle height 12 in, axis spacing 7.9 in	NRC0.85
1.6 in	16 in	baffle height 14 in, axis spacing 12 in	NRC0.75
1.6 in	14 in	baffle height 14 in, axis spacing 12 in	NRC0.80
1.6 in	12 in	baffle height 12 in, axis spacing 12 in	NRC0.75
1.6 in	7.9 in	baffle height 7.9 in, axis spacing 7.9 in	NRC0.75
1.6 in	24 in	baffle height 24 in, axis spacing 24 in	NRC0.75
1.6 in	12 in	baffle height 4.1 in, axis spacing 3.9 in	NRC0.75
1.6 in	14 in	baffle height 14 in, axis spacing 24 in	NRC0.65
1.6 in	7.9 in	baffle height 7.9 in, axis spacing 12 in	NRC0.65
0.9 in	7.9 in	baffle height 7.9 in, axis spacing 7.9 in	NRC0.65
0.9 in	7.9 in	baffle height 7.9 in, axis spacing 5.9 in	NRC0.70
1.6 in	16 in	baffle height 14 in, axis spacing 24 in	NRC0.60
1.6 in	12 in	baffle height 12 in, axis spacing 24 in	NRC0.60
0.9 in	7.9 in	baffle height 7.9 in, axis spacing 9.8 in	NRC0.60
0.9 in	7.9 in	baffle height 7.9 in, axis spacing 12 in	NRC0.55
0.9 in	16 in	baffle height 7.9 in, axis spacing 5.9 in	NRC0.70
1.6 in	7.9 in	baffle height 7.9 in, axis spacing 24 in	NRC0.50
1.6 in	12 in	baffle height 4.1 in, axis spacing 7.9 in	NRC0.60
0.9 in	7.9 in	baffle height 7.9 in, axis spacing 16 in	NRC0.50
0.9 in	16 in	baffle height 7.9 in, axis spacing 7.9 in	NRC0.65
0.9 in	16 in	baffle height 7.9 in, axis spacing 9.8 in	NRC0.60
0.9 in	16 in	baffle height 7.9 in, axis spacing 12 in	NRC0.55
0.9 in	7.9 in	baffle height 7.9 in, axis spacing 20 in	NRC0.45
0.9 in	16 in	baffle height 7.9 in, axis spacing 16 in	NRC0.50
0.9 in	16 in	baffle height 7.9 in, axis spacing 20 in	NRC0.45

Test report: H231016P1/3k_rev00

NRC: 0.90 (derived from ISO 354 lab data)

Institute: GiB mbH, Arnstorf

Room volume: 7,363 cu ft

Object area: 116 sq ft

Measured values as a table (27 measurements)

MUTE+ board baffle: 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
40 mm · 400 mm · baffle height 350 mm, axis spacing 300 mm	0.75	0.15	0.27	0.48	0.45	0.46	0.44	0.51	0.62	0.79	0.87	0.94	0.98	1.02	1.03	1.03	1.01	1.02	0.99
40 mm · 400 mm · baffle height 350 mm, axis spacing 600 mm	0.60	0.10	0.24	0.44	0.37	0.41	0.39	0.42	0.45	0.61	0.71	0.77	0.79	0.83	0.81	0.80	0.81	0.84	0.84
40 mm · 350 mm · baffle height 350 mm, axis spacing 300 mm	0.80	0.21	0.34	0.57	0.51	0.53	0.49	0.57	0.65	0.79	0.89	0.95	1.00	1.04	1.02	1.01	1.00	1.00	1.00
40 mm · 350 mm · baffle height 350 mm, axis spacing 600 mm	0.65	0.18	0.30	0.50	0.48	0.51	0.51	0.47	0.53	0.63	0.74	0.77	0.78	0.81	0.80	0.78	0.78	0.80	0.81
40 mm · 300 mm · baffle height 300 mm, axis spacing 600 mm	0.60	0.16	0.21	0.41	0.50	0.52	0.48	0.45	0.47	0.53	0.64	0.70	0.75	0.77	0.73	0.75	0.73	0.72	0.74
40 mm · 300 mm · baffle height 300 mm, axis spacing 300 mm	0.75	0.21	0.30	0.54	0.56	0.56	0.51	0.52	0.58	0.68	0.82	0.92	0.99	1.01	0.97	0.97	0.96	0.93	0.97
40 mm · 300 mm · baffle height 300 mm, axis spacing 200 mm	0.85	0.23	0.37	0.67	0.59	0.61	0.54	0.57	0.65	0.79	0.94	0.99	1.06	1.07	1.06	1.06	1.04	1.03	1.07
40 mm · 200 mm · baffle height 200 mm, axis spacing 600 mm	0.50	0.11	0.14	0.28	0.38	0.39	0.48	0.43	0.45	0.46	0.50	0.54	0.56	0.59	0.59	0.58	0.59	0.59	0.58
40 mm · 200 mm · baffle height 200 mm, axis spacing 300 mm	0.65	0.14	0.18	0.39	0.50	0.47	0.60	0.59	0.55	0.55	0.61	0.72	0.82	0.84	0.84	0.85	0.83	0.83	0.84
40 mm · 200 mm · baffle height 200 mm, axis spacing 200 mm	0.75	0.14	0.21	0.46	0.56	0.52	0.64	0.62	0.58	0.60	0.71	0.84	0.93	0.95	0.98	1.00	0.98	0.98	0.98
40 mm · 600 mm · baffle height 600 mm, axis spacing 600 mm	0.75	0.34	0.41	0.43	0.45	0.47	0.48	0.63	0.68	0.80	0.85	0.90	0.92	0.91	0.89	0.90	0.89	0.90	0.92
40 mm · 600 mm · baffle height 600 mm, axis spacing 300 mm	0.85	0.44	0.54	0.48	0.46	0.55	0.63	0.81	0.81	0.94	0.98	1.04	1.06	1.08	1.07	1.08	1.05	1.06	1.06
40 mm · 600 mm · baffle height 600 mm, axis spacing 200 mm	0.90	0.54	0.64	0.54	0.47	0.61	0.74	0.87	0.88	0.99	1.02	1.07	1.08	1.10	1.07	1.11	1.10	1.11	1.13
40 mm · 305 mm · baffle height 105 mm, axis spacing 200 mm	0.60	–	0.12	0.21	0.31	0.39	0.40	0.40	0.45	0.49	0.59	0.72	0.76	0.83	0.85	0.89	0.93	0.92	0.95
40 mm · 305 mm · baffle height 105 mm, axis spacing 100 mm	0.75	0.11	0.19	0.30	0.46	0.56	0.55	0.56	0.58	0.66	0.74	0.89	0.94	1.00	1.01	1.04	1.10	1.09	1.12
24 mm · 200 mm · baffle height 200 mm, axis spacing 200 mm	0.65	0.14	0.19	0.37	0.48	0.44	0.55	0.55	0.52	0.53	0.60	0.70	0.80	0.89	0.91	0.96	0.94	0.90	0.91
24 mm · 200 mm · baffle height 200 mm, axis spacing 250 mm	0.60	0.13	0.15	0.31	0.44	0.46	0.49	0.52	0.51	0.53	0.54	0.64	0.74	0.81	0.84	0.88	0.87	0.89	0.90
24 mm · 200 mm · baffle height 200 mm, axis spacing 300 mm	0.55	0.12	0.13	0.31	0.43	0.44	0.48	0.48	0.49	0.50	0.50	0.59	0.71	0.76	0.77	0.83	0.81	0.77	0.80
24 mm · 200 mm · baffle height 200 mm, axis spacing 150 mm	0.70	0.13	0.15	0.36	0.48	0.51	0.51	0.52	0.54	0.58	0.64	0.77	0.88	0.94	0.97	1.06	1.04	1.02	1.05
24 mm · 200 mm · baffle height 200 mm, axis spacing 400 mm	0.50	0.11	0.12	0.28	0.40	0.40	0.45	0.45	0.44	0.45	0.48	0.54	0.61	0.65	0.67	0.70	0.71	0.67	0.72
24 mm · 200 mm · baffle height 200 mm, axis spacing 500 mm	0.45	0.10	0.11	0.25	0.36	0.36	0.41	0.38	0.40	0.42	0.42	0.48	0.53	0.57	0.57	0.60	0.61	0.57	0.60
24 mm · 400 mm · baffle height 200 mm, axis spacing 150 mm	0.70	0.13	0.14	0.37	0.41	0.37	0.40	0.45	0.54	0.71	0.76	0.83	0.95	0.98	1.03	1.07	1.11	1.08	1.13
24 mm · 400 mm · baffle height 200 mm, axis spacing 200 mm	0.65	0.11	0.13	0.35	0.38	0.34	0.37	0.40	0.48	0.65	0.70	0.76	0.89	0.92	0.98	1.00	1.03	1.00	1.06
24 mm · 400 mm · baffle height 200 mm, axis spacing 250 mm	0.60	0.11	0.12	0.33	0.36	0.32	0.36	0.37	0.43	0.58	0.64	0.68	0.83	0.85	0.89	0.91	0.92	0.91	0.96
24 mm · 400 mm · baffle height 200 mm, axis spacing 300 mm	0.55	0.10	0.11	0.31	0.35	0.31	0.35	0.35	0.41	0.54	0.59	0.66	0.77	0.81	0.84	0.86	0.87	0.86	0.87
24 mm · 400 mm · baffle height 200 mm, axis spacing 400 mm	0.50	–	–	0.26	0.31	0.28	0.32	0.31	0.35	0.47	0.54	0.58	0.66	0.70	0.74	0.74	0.76	0.77	0.81
24 mm · 400 mm · baffle height 200 mm, axis spacing 500 mm	0.45	–	–	0.23	0.27	0.24	0.28	0.28	0.31	0.41	0.46	0.54	0.61	0.62	0.63	0.66	0.66	0.63	0.67

Measured values as a table (27 measurements)

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Last updated: 09/14/2026