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

Datasheet

aPerf® pad

Name: aPerf® pad
Brand: BK Raumakustik

aPerf pad

WallCeilingFreestanding

Description

The self-supporting acoustic mat for industrial and machine acoustics (formerly 'aPerf mat'). More robust and dimensionally stable than the soft aPerf® wool, it is suited to lining halls, machine enclosures, cavities and expanded-metal ceilings, emission-free and stable even under changing climate conditions. Available as a high-absorption thick-layer absorber (50 mm) up to the highest absorption class A, in white, silver grey (light grey) and black.

Technical data

Material: 100 % polyester, thermally bonded, self-supporting

Surface: smooth

Up to fire class: Low flammability (B-s2,d0) per DIN EN 13501-1 (2 in) — Per DIN EN 13501-1 (2 in); additionally ASTM E84 Class A for the white version.

Application: industrial and machine acoustics, hall lining, machine enclosures, cavity/expanded-metal-ceiling absorber

Certifications: OEKO-TEX Standard 100; inert to fungi/bacteria DIN EN ISO 846; emission-tested AgBB 2021 / French VOC A+ / Belgian VOC

Colours: white, silver grey (light grey), black (all 2 in)

Measurement data

Sound absorption

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

NRC

0.95

Frequency values

α_p per octave band

f (Hz)	125	250	500	1k	2k	4k
α_p	0.50	0.90	0.95	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 7.9 in	NRC0.95
	Direct (no gap)	NRC0.90

NRC: 0.95 (derived from ISO 354 lab data)

Weight / density: 2.500 g/m²

Measured values as a table (2 measurements)

aPerf® pad: 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
50 mm · 2.500 g/m² · Direct (no gap)	0.90	0.13	0.21	0.29	0.48	0.68	0.77	0.86	0.91	0.94	1.03	0.98	0.98	0.97	1.03	1.03	1.01	1.04	1.07
50 mm · 2.500 g/m² · Overall build-up 200 mm	0.95	0.44	0.34	0.74	0.92	0.83	1.02	0.96	0.94	0.95	0.94	0.99	1.01	0.99	1.05	1.02	1.03	1.04	1.05

Measured values as a table (2 measurements)

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

Last updated: 09/16/2026