Manufacturer

SUAM Schall- & Akustikmanufaktur GmbH

SUAM Akustikmanufaktur develops and manufactures custom room-acoustic elements made from thermally bonded polyester wadding in Bad Wünnenberg (North Rhine-Westphalia). The range covers ceiling rafts (rectangular, round, free-form), baffles, wall and ceiling absorbers, acoustic art panels, the dekaBel metal cassette absorber, and the modular free-standing screen. The PES core material is binder-free, fully recyclable and meets fire class B1 per DIN 4102. Certified to OEKO-TEX Standard 100 (test no. 94.0.0541).

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SUAM Round Ceiling Raft

Name: SUAM Round Ceiling Raft
Brand: SUAM Schall- & Akustikmanufaktur GmbH

Round Ceiling Raft

Free-hanging

Description

The round SUAM ceiling raft is a horizontally suspended disc absorber made of polyester wadding, 80 mm thick. Four standard diameters: Ø 800, 1000, 1200, and 1550 mm. The measured values are available as equivalent sound absorption area A_obj per raft and simplify planning by quantity. Like all SUAM products: 100% polyester wadding without chemical binders, B1 according to DIN 4102, available in over 1,000 color variants.

Technical data

Material: Polyester wadding 3.1 in

Up to fire class: B1 according to DIN 4102-1 (not easily flammable, core material)

Application: Round Ceiling Raft

Certifications: OEKO-TEX Standard 100 (test no. 94.0.0541), binder-free, formaldehyde-free, allergy-friendly, fungicidal, bactericidal, 100% recyclable

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 4 variants

A_obj

2.46 m²

at 1 kHz

Frequency values

A_obj per ISO 354 · octave band (m²)

f (Hz)	125	250	500	1k	2k	4k
A_obj	1.23	2.21	2.19	2.46	2.85	3.21

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		Value
Ø 61 in · 3.1 in	assembly height 11 in	A_obj2.46m²
Ø 39 in · 3.1 in	assembly height 11 in	A_obj1.85m²
Ø 47 in · 3.1 in	assembly height 11 in	A_obj1.59m²
Ø 31 in · 3.1 in	assembly height 7.9 in	A_obj0.72m²

Institute: SUAM in-house (AkuLap class 2, B.A. Carmen Barna (SUAM))

Measurement date: 2020-04-23

Room volume: 1,324 cu ft

Object area: 20 sq ft

Dimensions: Ø 1550 × 3.1 in, free-hanging

Measured values as a table (4 measurements)

SUAM Round Ceiling Raft: 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
Ø 800 mm · 80 mm · assembly height 200 mm (A_obj, m²)	–	0.19	0.16	0.67	0.46	0.44	0.78	0.82	0.67	0.72	0.71	0.76	0.69	0.89	0.87	0.97	0.92	0.96	1.08
Ø 1000 mm · 80 mm · assembly height 280 mm (A_obj, m²)	–	0.23	0.03	0.81	0.53	0.80	1.11	1.02	0.95	0.97	2.21	2.15	1.18	1.27	1.28	1.31	1.40	1.53	1.54
Ø 1200 mm · 80 mm · assembly height 280 mm (A_obj, m²)	–	0.61	0.13	1.54	0.93	1.26	1.36	1.30	1.26	1.38	1.60	1.54	1.63	1.78	1.87	1.93	1.94	2.05	2.10
Ø 1550 mm · 80 mm · assembly height 280 mm (A_obj, m²)	–	0.89	0.62	2.18	1.98	2.39	2.27	2.19	2.20	2.17	2.28	2.50	2.59	2.79	2.69	3.08	3.14	3.29	3.19

Measured values as a table (4 measurements)

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Last updated: 09/04/2026