Manufacturer

SONATECH GmbH + Co. KG

SONATECH is a southern German specialist for room acoustics and noise control, based in Ungerhausen (Bavaria). The company supplies acoustic solutions from a single source: consultancy, sound measurement, product and installation. The range spans the textile pure and pure+ ceiling and wall elements, the printable ConceptLine elements and QuietLine ceiling sails, Basotect and PUR foam absorbers, SkyLine acoustic columns and industrial solutions such as Cube, Baffel and MultiLane. The absorption values come from laboratory measurements based on the approach of DIN EN ISO 354. The materials are flame-retardant to DIN 4102 B1; for the Basotect foams, building-authority fire-protection test certificates are available.

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Documents

Datasheet

SONATECH Pur Sinus

Name: SONATECH Pur Sinus
Brand: SONATECH GmbH + Co. KG

Pur Sinus

WallCeiling

Description

Pur Sinus is a flexible PUR foam absorber with a profiled sine surface. Its optimized flow resistance and structured visible face produce a broadband absorber for room lining in the residential sector, in speaker booths, and for general noise reduction.

Technical data

Material: flexible PUR foam, open-cell, sine profile

Up to fire class: DIN 4102 B3 / FMVSS 302

Colours: dark grey

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 3 variants

Choose thickness

NRC

0.30

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.05	0.10	0.25	0.35	0.50	0.60

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NRC: 0.30 (derived from ISO 354 lab data)

Institute: Office for Acoustic Engineering, Memmingen

Measurement date: 2005-10-25

Measured values as a table (3 measurements)

SONATECH Pur Sinus: 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
20 mm · direkt, without rear ventilation gap	0.30	0.03	0.05	0.09	0.10	0.11	0.16	0.20	0.25	0.28	0.33	0.38	0.41	0.44	0.48	0.52	0.56	0.62	0.69
30 mm · direkt, without rear ventilation gap	0.40	0.04	0.06	0.13	0.16	0.18	0.25	0.29	0.33	0.36	0.41	0.49	0.51	0.53	0.60	0.65	0.73	0.86	1.04
50 mm · direkt, without rear ventilation gap	0.60	0.08	0.09	0.22	0.27	0.33	0.43	0.52	0.56	0.60	0.67	0.66	0.69	0.71	0.75	0.80	0.83	0.98	1.12

Measured values as a table (3 measurements)

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Last updated: 09/15/2026