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.

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aPerf® mat

Name: aPerf® mat
Brand: BK Raumakustik

aPerf mat

WallCeiling

Description

The new, lightweight acoustic mat of the aPerf® family (since 06/2026, not to be confused with the former 'aPerf mat', now called aPerf pad): a self-supporting polyester nonwoven in four thicknesses from 20 to 50 mm. For flat wall and ceiling absorption and as a backing. Mounted directly it reaches αw 0.50 (20 mm) up to 0.85 (50 mm); emission-free and fully recyclable.

Technical data

Material: 100 % polyester, thermally bonded, self-supporting, no chemical binders

Surface: smooth fleece

Application: flat wall and ceiling absorption, backing

Certifications: OEKO-TEX Standard 100 (aPerf® material)

Measurement data

Sound absorption

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

Choose thickness

NRC

0.55

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.10	0.25	0.45	0.60	0.75	0.80

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NRC: 0.55 (derived from ISO 354 lab data)

Weight / density: 600 g/m²

Measured values as a table (4 measurements)

aPerf® mat: 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 · 600 g/m² · Direct (no gap)	0.55	0.07	0.11	0.13	0.20	0.24	0.30	0.39	0.49	0.53	0.57	0.62	0.67	0.68	0.76	0.79	0.82	0.81	0.84
30 mm · 900 g/m² · Direct (no gap)	0.65	0.11	0.17	0.19	0.30	0.36	0.45	0.56	0.63	0.70	0.74	0.78	0.83	0.84	0.89	0.89	0.90	0.89	0.91
40 mm · 1.200 g/m² · Direct (no gap)	0.75	0.14	0.21	0.25	0.37	0.46	0.55	0.67	0.74	0.82	0.86	0.88	0.91	0.92	0.94	0.93	0.96	0.94	0.96
50 mm · 1.500 g/m² · Direct (no gap)	0.80	0.15	0.25	0.31	0.46	0.56	0.68	0.78	0.83	0.92	0.94	0.94	0.97	0.93	0.95	0.94	0.97	0.98	1.04

Measured values as a table (4 measurements)

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Last updated: 09/16/2026