Back to database
PTB – Physikalisch-Technische Bundesanstalt
Reference data from the PTB database for sound absorption coefficients. These data provide a planning baseline and come from standardised measurements.
1,746 products
Page 24 of 37
PTB · Mineral woolNRC0.75
Owakustik MF 4 Jura mineral fiber panel
PTB · Mineral woolNRC0.65
Owakustik MF 5 Struktura mineral fiber absorber
PTB · MetalNRC0.80
OWAtecta L 2516 steel sheet ceiling tile with non-woven
PTB · MetalNRC0.50
OWAtecta perfora micro-perforated steel ceiling tile, 0.64% open area
PTB · Mineral woolNRC0.55–0.85
Fiberglass duct liner with surface coating
PTB · Mineral woolNRC0.65–1.00
Owens-Corning Fiberglass duct liner board
PTB · Mineral woolNRC0.70–1.15
Owens-Corning Type 701 flexible insulation board
PTB · Mineral woolNRC0.70–1.15
Semirigid insulation board
PTB · Mineral woolNRC0.65–1.10
Owens-Corning Type 705 rigid insulation board
PTB · OtherNRC0.75
P.G.M. screens for HF
PTB · Reference surfaceNRC0.05
Parquet fixed in asphalt, on concrete
PTB · Reference surfaceNRC0.10
Parquet on counterfloor
PTB · Reference surfaceNRC0.05
Floors, Parquet Floor
PTB · Reference surfaceNRC0.05
Parquet flooring, floating installation
PTB · Mineral woolNRC0.65
Acoustical panels, lay-in
PTB · Mineral woolNRC0.65
Acoustical panels, lay-in
PTB · Mineral woolNRC0.55
PAVAFibre Stria 2 acoustical panels, lay-in
PTB · MetalNRC0.65–0.80
Porous sintered metal panel
PTB · MetalNRC0.95
Porous sintered metal panel, backed with 4 inch fiberglass
PTB · FabricNRC1.00
Perdue Acoustics LSS-AT fabric-covered panel, 6 pcf rock wool core
PTB · FabricNRC1.05
Perdue Acoustics LSS-RHRF fabric-covered panel, 6 pcf rock wool core
PTB · FabricNRC0.95
Perdue Acoustics LSS-RHRF fabric-covered panel, 8 pcf rockwool core
PTB · FabricNRC0.95
Fabric-covered panel, 8 pcf rockwool core
PTB · Plastic & filmNRC0.90
Vinyl-covered panel, 8 pcf rockwool core
PTB · Plastic & filmNRC0.90
Vinyl-covered panel, 8 pcf rockwool core
PTB · Stone & concreteNRC0.05
Perforated block 30x25x16 cm, 50% open area + whitewash
PTB · Stone & concreteNRC0.05
Perforated alveolated block 30x25x19 cm, F/A = 55% + whitewash
PTB · Stone & concreteNRC0.05
Perforated alveolar brick for padding 30 x 19 x 25 cm, 60% open area + whitewash
PTB · Stone & concreteNRC0.05
Perforated brick 8x24x12 cm with 6 holes, open area = 60% + whitewash
PTB · Reference: audienceNRC0.75
Lightly upholstered chair, occupied, front side of seat back 1.5 cm, Basel
α per m² audience area
PTB · Reference: audienceNRC0.90
Areas with audience, orchestra or choir including narrow aisles
α per m² audience area
PTB · Plaster & sprayNRC0.60
Acoustical plaster, Portland cement-base
PTB · FoamNRC0.35–1.00
pinta acoustic Absorber LINEAR melamine foam
PTB · FoamNRC0.70–1.35
pinta acoustic PLANO-S melamine foam absorber
PTB · FoamNRC0.60–0.75
pinta acoustic PLANO-T melamine foam absorber
PTB · FoamNRC0.50–0.85
pinta acoustic RONDO – T melamine foam absorber
PTB · FoamNRC0.80–0.95
pinta acoustic WETROOM melamine foam absorber
PTB · FoamNRC0.45–1.05
pinta acoustic ACOUSTIC PANEL melamine foam, willtec / non-woven
PTB · FoamNRC0.90
pinta acoustic AMBIENT E SPECTRUM melamine foam
PTB · FabricNRC0.70–0.90
pinta acoustic ARTWORK textile-faced melamine foam
PTB · FabricNRC0.60–0.85
pinta acoustic BALANCE ART – Trevira textile absorber
PTB · FabricNRC0.50–0.60
pinta acoustic BALANCE ART Artist textile absorber element
PTB · FabricNRC0.60–0.85
pinta acoustic BALANCE ART Poly200 textile absorber
PTB · FoamNRC0.85–1.50
pinta acoustic BALANCE willtec melamine foam with non-woven facing
PTB · MetalNRC0.30–0.40
pinta acoustic EXPANDEDLINE MEDIUM expanded metal raft
PTB · MetalNRC0.25–0.35
pinta acoustic EXPANDEDLINE MEDIUM expanded metal raft (series 2)
PTB · MetalNRC0.25–0.30
pinta acoustic EXPANDEDLINE MEDIUM expanded metal raft
PTB · MetalNRC0.25–0.40