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.

All products by this manufacturer Manufacturer website

Documents

Datasheet

SONATECH Pur Pyramid

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

Pur Pyramid

WallCeiling

Description

Pur Pyramid is a flexible PUR foam absorber with a pyramid profile. Its optimized flow resistance and structured surface produce a broadband absorber for music practice rooms, speaker booths, and general noise reduction in private settings.

Technical data

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

Up to fire class: DIN 4102 B3 / FMVSS 302

Colours: dark grey

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 2 variants

Choose thickness

α_w

0.35

Frequency values

α_p per ISO 11654

f (Hz)	125	250	500	1k	2k	4k
α_p	0.05	0.15	0.35	0.65	0.95	1.00

Create a permanent free account — Access frequency bands, variants and export.

Free. No password required.

Absorber class: D

Institute: Office for Acoustic Engineering, Memmingen

Measurement date: 2006-04-03

Measured values as a table (2 measurements)

SONATECH Pur Pyramid: 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
30 mm · direkt, without rear ventilation gap	0.35	D	0.06	0.05	0.08	0.13	0.15	0.20	0.28	0.31	0.39	0.52	0.64	0.74	0.85	0.94	1.04	1.12	1.13	1.05
50 mm · direkt, without rear ventilation gap	0.50	D	0.03	0.02	0.11	0.18	0.23	0.32	0.34	0.46	0.55	0.67	0.75	0.79	0.83	0.86	0.95	0.97	0.97	0.91

Measured values as a table (2 measurements)

Access frequency bands, variants and export. Create a permanent free account

Last updated: 16/09/2026