Manufacturer

BK Raumakustik

BK Raumakustik (Böcking Kemmerling Raumakustik GmbH) plans and delivers bespoke room-acoustic solutions made from the aPerf® material: from consulting through development to turnkey installation. Head office in Neuss, Rhine/Main branch in Frankfurt. aPerf® is a sound-absorbing nonwoven made of 100 % polyester (partly recycled PET bottles), thermally and mechanically bonded without chemical binders. The material is self-supporting and can be used without a frame, is dyed throughout, ball-impact-safe per DIN 18032, OEKO-TEX Standard 100 certified and fully recyclable. Manufactured in Germany and Switzerland. From the aPerf® materials BK Raumakustik builds wall panels, ceiling rafts, desk dividers, broadband and bass absorbers, acoustic prints and industrial hall acoustics. Member of the DGNB.

All products by this manufacturer Manufacturer website

Documents

Web/groove 13/4 · Oak natural Web/groove 28/4 · Oak natural Web/groove 26/13 · Oak natural

LinePerf®

Name: LinePerf®
Brand: BK Raumakustik

LinePerf

WallCeiling

Description

The linear acoustic design absorber: a high-absorption aPerf® carrier board (19 mm, black) with a one-sided oak decor surface (natural oak) and a milled groove/web profile. The warm slat look for walls and ceilings, from the meeting room to the home cinema. In three profile widths; as a 50 mm overall build-up it works broadband, and with a backing 3 cm bass insert up to the highest absorption class A. Custom production in further aPerf® base colours and decors, in 19 or 25 mm.

Technical data

Material: aPerf® carrier board 100 % polyester (0.7 in, 3,200 g/m², black) with an oak decor surface (natural oak)

Surface: oak decor (natural oak), milled slat (web/groove)

Up to fire class: Low flammability (B-s1,d0) per DIN EN 13501-1 (carrier board) — carrier board per DIN EN 13501-1

Application: linear wall and ceiling panels, home cinema, meeting and prestige rooms

Certifications: OEKO-TEX Standard 100 (aPerf® carrier board)

Colours: natural oak (standard); custom decors and aPerf® base colours on request

Measurement data

Sound absorption

Reverberation chamber (ASTM C423 / ISO 354)· 9 variants

Choose slat profile

NRC

0.95

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.20	0.70	1.00	1.00	1.00	1.00

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

Free. No password required.

Compare		Value
	Overall build-up 2 in + 1.2 in bass insert	NRC0.95
	Overall build-up 3.1 in + 2.4 in bass insert	NRC1.05
	Overall build-up 2 in	NRC0.70

NRC: 0.95 (derived from ISO 354 lab data)

Institute: Müller-BBM Building Solutions GmbH

Measured values as a table (9 measurements)

LinePerf®: 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
Profile 13/4 · Overall build-up 50 mm	0.70	0.03	0.06	0.11	0.19	0.23	0.36	0.49	0.65	0.79	0.96	1.00	1.03	1.02	1.01	1.01	1.01	1.01	0.93
Profile 13/4 · Overall build-up 50 mm + 3 cm bass insert	0.95	0.11	0.18	0.33	0.55	0.68	0.85	0.93	1.00	1.02	1.03	1.05	1.05	1.04	1.04	1.05	1.04	1.02	0.92
Profile 13/4 · Overall build-up 80 mm + 6 cm bass insert	1.05	0.30	0.46	0.74	0.92	1.07	1.13	1.10	1.06	1.05	1.03	1.01	1.03	1.04	1.05	1.06	1.05	0.99	0.97
Profile 28/4 · Overall build-up 50 mm	0.75	0.05	0.06	0.14	0.25	0.31	0.46	0.65	0.82	0.95	1.06	1.04	1.02	0.95	0.89	0.83	0.77	0.71	0.59
Profile 28/4 · Overall build-up 50 mm + 3 cm bass insert	0.95	0.14	0.22	0.39	0.63	0.77	0.93	1.00	1.07	1.06	1.04	0.99	1.00	0.96	0.92	0.86	0.79	0.69	0.58
Profile 28/4 · Overall build-up 80 mm + 6 cm bass insert	1.00	0.34	0.52	0.78	0.95	1.09	1.13	1.08	1.03	1.03	1.00	0.95	0.98	0.99	0.96	0.88	0.79	0.69	0.60
Profile 26/13 · Overall build-up 50 mm	0.75	0.04	0.07	0.12	0.23	0.28	0.43	0.59	0.74	0.87	1.02	1.04	1.04	1.02	0.99	0.98	0.95	0.92	0.80
Profile 26/13 · Overall build-up 50 mm + 3 cm bass insert	0.95	0.13	0.20	0.37	0.61	0.75	0.90	0.96	1.04	1.03	1.04	1.03	1.03	1.02	1.02	1.02	0.98	0.93	0.81
Profile 26/13 · Overall build-up 80 mm + 6 cm bass insert	1.05	0.34	0.49	0.77	0.95	1.08	1.11	1.07	1.03	1.04	1.00	0.99	1.00	1.02	1.04	1.02	0.97	0.92	0.82

Measured values as a table (9 measurements)

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

Last updated: 09/16/2026