Airborne sound absorption

Airborne sound absorption, often simply called sound absorption, is necessary when the noise level in the room containing the source of noise needs to be reduced.

Airborne sound absorption is achieved by converting some of the kinetic energy of the air molecules into heat. This happens through friction on the contact surfaces of fibrous or open-pored foam materials into which sound waves can penetrate. However, other designs are also in use, such as chamber, foil and resonance absorbers.

The absorption is highly dependent on frequency. Generally it is true that the lower the frequencies to be dampened, the thicker the absorption material must be.

The effectiveness of sound-absorbing materials is measured, among other methods, by the degree of absorption α, the ratio of absorbed sound fraction to the incident sound intensity.

video technische daempfung
Technische Dämpfung

Our materials for airborne sound absorption:

Type of material
M 1135/30 M 1135/30 PU-foam (polyether, burl-foam) PU
M 1148 (unavailable, see alternative S 3733) M 1148 (unavailable, see alternative S 3733) PU-foam (polyether), laminated on bitumen heavy foil, covered with a composite of PU-foam (polyester) and PVC-artificial leather PU
S 3733/…-…-2.1-L/ZG-GL S 3733/…-…-2.1-L/ZG-GL PU-foam (polyether), laminated on bitumen heavy foil, covered with a composite of PU-foam (polyester) and PVC-artificial leather PU
M 1165 (unavailable, see alternative S 3233) M 1165 (unavailable, see alternative S 3233) PU-foam (polyether), laminated with a composite of PU-foam (polyester) and PVC-artificial leather as a surface PU
S 3233/…-L/ZG-GL S 3233/…-L/ZG-GL PU-foam (polyether), laminated with a composite of PU-foam (polyester) and PVC-artificial leather as a surface PU
M 1281/30-2.1 M 1281/30-2.1 Molded PU-foam (polyether), laminated on bitumen heavy foil PU
M 1421 (see alternative PU-foam classic) M 1421 (see alternative PU-foam classic) PU-foam (polyether), surface skin developing PU-foil, grey PU
PU-foam classic PU-foam classic PU-foam (polyether, open-cell), surface skin developing PU-foil (air-tight), black PU
M 1422/-2.1 (see alternative S 3701/-2.1) M 1422/-2.1 (see alternative S 3701/-2.1) PU-foam (polyether), laminated on bitumen heavy foil, surface skin developing PU-foil, grey PU
S 3701/-2.1 S 3701/-2.1 PU-foam (polyether), laminated on bitumen heavy foil, surface PU-foil (mechanical resistant) PU
M 1425 M 1425 PU-foam, laminated of a composite of two glass fibre mats with intermediate bitumen heavy foil, surface PU-foil PU / Glass fiber / Bitumen heavy foil
M 1516 M 1516 PU-foam (polyether) PU
M 1579 M 1579 PU-foam (polyether), covered with PE-foam (aluminum vaporized) PU
M 1701 M 1701 PU-foam (polyether), surface PES-fleece PU
M 1724 M 1724 Glass fibre mat, laminated on PU-foam (polyester) and bitumen heavy foil, both sides laminated with glass fibre mats, surface perforated aluminium foil PU / Glass fibre / Bitumen heavy foil
M 1754 M 1754 Glass fibre mat, laminated on bitumen heavy foil and a glass fibre mat, surface perforated aluminium foil Glass fibre / Bitumen heavy foil
M 1761 M 1761 Glass fibre mat, surface perforated aluminium foil Glass fibre
M 1765 M 1765 Glass fibre mat, lined on PU-foam (polyether), surface perforated aluminium foil PU
M 1765/-2.1 M 1765/-2.1 Glass fibre mat, laminated on PU-foam (polyether) and bitumen heavy foil, surface perforated aluminium foil PU
M 1791a/b-fleece M 1791a/b-fleece PU-foam (polyether), both sides lined with PES-fleece PU
M 2023 (self-adhesive / not adhesive) M 2023 (self-adhesive / not adhesive) PU-foam (polyester), lozenge embossed surface compaction PU
M 2033/-2.1 M 2033/-2.1 PU-foam (polyester), laminated on bitumen heavy foil, lozenge embossed surface compaction PU
M 2044/20 (self-adhesive / not adhesive) M 2044/20 (self-adhesive / not adhesive) Melamine flexible foam, surface carbon fiber fleece (lozenge embossed) melamine resin
M 2097 M 2097 PU-faom (polyester), lozenge embossed surface compaction PU
S 3205/...-L/... S 3205/...-L/... PU-foam (polyether), surface PVC-artificial leather stamped PU
S 3210 S 3210 PU-flexible foam (polyester-polyol), thermo compacted surface PU
S 3212a S 3212a PU-foam (polyether) PU
S 3218a S 3218a PU-foam PU
S 3705a/-3.0 S 3705a/-3.0 PU-foam (polyether, open-cell), laminated on heavy foil, surface PU-foil (air-tight, mechanical resistant) PU / Plastic heavy foil
S 3710/-2.1 S 3710/-2.1 PU-foam (polyether), laminated on bitumen heavy foil, surface PU-foil (microporous) PU
S 3710/-3.2 S 3710/-3.2 PU-foam (polyether), laminated on bitumen heavy foil, surface PU-foil (microporous) PU
S 3714 S 3714 PU-foam (polyester), laminated on polyethylene vinyl acetate(EVA)-heavy foil, lozenge embossed surface compaction PU
S 3806/...-2.1-10-2.1-... S 3806/...-2.1-10-2.1-... PU-foam (polyether, 2 layers), each laminated on bitumen heavy foil, lozenge embossed surface compaction (RG) or surface skin developing PU-foil (VH) PU / Bitumen heavy foil
S 3807/...-2.1-10-... S 3807/...-2.1-10-... PU-foam (polyester, 2 layers) with an intermediate layer of bitumen heavy foil, lozenge embossed surface compaction (RG) or surface skin developing PU-foil (VH) PU / Bitumen heavy foil
S 3809 S 3809 Glass fibre mat, laminated on bitumen heavy foil and a glass fibre mat, surface perforated aluminium foil Glass fibre / Bitumen heavy foil
S 3908 S 3908 Glass fibre mat, surface perforated aluminium foil Glass fibre
S 3911/-Tect-o-phob AL S 3911/-Tect-o-phob AL Melamine resin foam (hydrophobic, oleophobic), grey, surface aluminium foil melamine resin
S 3913/-Tect-AL S 3913/-Tect-AL Melamine resin foam, light grey, surface aluminium foil melamine resin
S 3914/...-Tect-V S 3914/...-Tect-V Melamine resin foam (open-cell), grey, surface polyester fleece melamine resin
S 3915/-Tect (self-adhesive / not adhesive) S 3915/-Tect (self-adhesive / not adhesive) Melamine resin foam (open-cell), light grey melamine resin
PU-foam stamped PU-foam stamped PU-foam (polyester), burl imprinted surface compaction PU
PU-foam classic PU-foam classic PU-foam (polyether, open-cell), surface skin developing PU-foil (air-tight), black PU
PU-foam micro PU-foam micro PU-foam (polyether, open-cell), surface skin developing PU-foil (microporous), black PU
Recycled foam 160 Recycled foam 160 Recycled foam from shredded PU-foam-oddments PU
Recycled foam 160/-PV Recycled foam 160/-PV Recycled foam from shredded PU-foam-oddments, surface polyester fleece, black PU