Manufacturer

akustikplus GmbH & Co. KG

akustikplus develops and manufactures decorative acoustic solutions from wood-based materials at its site in Stephanskirchen near Rosenheim. The company belongs to the Hamberger Group and combines industrial production with real-wood veneer expertise. The range comprises four product lines: smartline (acoustic panels with an integrated wood-wool absorber), slimline (slender slotted panels mounted over a mineral-wool insulation layer), proline (micro-perforated acoustic boards, also available as a furniture board decorative on both sides) and designline (felt panels with veneered MDF slats). Non-combustible versions on a gypsum-fibre base are available on request.

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designline 12 mm

Name: designline 12 mm
Brand: akustikplus GmbH & Co. KG

Wall

Description

The designline is a felt panel with applied MDF slats in a real-wood veneer or decorative laminate finish, giving the classic slatted look. The dark PET felt substrate remains visible between the slats and forms the absorbing layer. Installation is by mounting adhesive or screw fixing through the felt substrate, optionally with an open cavity behind for greater depth effect. The 12 mm version is the slimmer wall variant with lower slats. It offers a reduced build-up while keeping the same line pattern, and is designed for wall mounting only.

Technical data

Material: Substrate: PET fibre (0.4 in, black), 60 % recycled content, PVC-free · Slats: MDF, 25 x 0.3 in (W x H)

Surface: Real-wood veneer or decorative laminate

Up to fire class: normally flammable D-s2,d2 per DIN EN 13501-1

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 2 variants

NRC

0.55

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.10	0.25	0.60	0.75	0.55	0.60

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Compare		Value
	3.5 in cavity (offen)	NRC0.55
	without cavity (direkt)	NRC0.25

Test report: B173205/4

NRC: 0.55 (derived from ISO 354 lab data)

Institute: Müller-BBM Building Solutions GmbH

Measurement date: 2024-08-12

Room volume: 7,049 cu ft

Object area: 116 sq ft

Dimensions: Overall build-up 3.9 in

Measured values as a table (2 measurements)

designline 12 mm: 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
without cavity (direkt)	0.25	0.02	0.02	0.03	0.04	0.05	0.06	0.07	0.11	0.14	0.19	0.26	0.36	0.47	0.59	0.77	0.99	1.02	0.88
88 mm cavity (offen)	0.55	0.06	0.09	0.13	0.19	0.26	0.35	0.46	0.61	0.69	0.77	0.75	0.67	0.53	0.48	0.61	0.63	0.63	0.61

Measured values as a table (2 measurements)

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Last updated: 09/13/2026