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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 12 of 37
PTB · Reference surfaceαw—
Smooth unpainted concrete
PTB · Reference surfaceαw0.05
Smooth brickwork, 10 mm deep pointing, pit sand mortar
PTB · Reference surfaceαw—
Smooth brickwork with flush pointing, painted
PTB · Stone & concreteαw0.10
Smooth brickwork with mineral wool in joints
PTB · Reference surfaceαw—
Glaze plaster
PTB · Foamαw0.35–0.55
Grohmann atona polystyrene sound-absorbing panel
PTB · Reference surfaceαw0.05
Glass, large panes of heavy plate glass
PTB · Reference surfaceαw0.05
Glass: Large panes of heavy plate glass
PTB · Foamαw0.40
Gummi-Stricker PSST asbestos foam panel with bitumen foil
PTB · Foamαw0.25
Gummi-Stricker PSST polyether foam absorber
PTB · Foamαw0.50
Gummi-Stricker PSST polyether foam absorption panel
PTB · Foamαw0.50
Gummi-Stricker PSST acoustic panel with heavy layer
PTB · Foamαw0.30
Gummi-Stricker PSST-Elemente convoluted foam absorber
PTB · Foamαw0.40
Gummi-Stricker PSST sound absorption panel FN 71/25
PTB · Foamαw0.25
Gummi-Stricker PSST sound absorption panel with heavy layer
PTB · Reference surfaceαw0.10
rubber floor (B)
PTB · Reference surfaceαw0.10
Rubber floor (series 2)
PTB · Reference surfaceαw0.10
Floors, 5 mm rubber carpet on concrete
PTB · Reference surfaceαw0.25
hairy carpet on CLS (g)
PTB · Stone & concreteαw0.05
Half full alveolated block 25x30x19 cm, F/A=45%, 1 month
PTB · Stone & concreteαw0.05
Half-full alveolated block 45x30x19 cm, F/A = 45% + whitewash
PTB · Stone & concreteαw0.05
half full alveolated block 30x25x19 cm F/A = 45% + whitewash
PTB · Stone & concreteαw0.05
Half full alveolated block 25x30x19 cm, F/A=45% without whitewash
PTB · Stone & concreteαw0.05
Half full alveolated block 25x30x19 cm F/A=45% with whitewash
PTB · Reference surfaceαw0.15
Hand-molded solid brick masonry with air cavity
PTB · Reference surfaceαw0.05
Hard surfaces (plaster, masonry, hard floors)
PTB · Woodαw0.15
Hardboard panel, 1/8 inch, 1 lb/ft² with bituminous roofing felt
PTB · Reference surfaceαw0.10
Hardwood floor
PTB · Mineral woolαw0.95–1.00
Herafon struktur stone wool ceiling tile with glass veil
PTB · Woodαw0.30–0.90
Heraklith Herakustik HAK F wood wool fiber absorber
PTB · Woodαw0.50–0.95
Heraklith Herakustik HAK G wood wool acoustic panel
PTB · Woodαw0.20–0.55
Heraklith Travertin micro acoustic panel
PTB · Woodαw0.40–0.50
Heraklith Travertin micro wood wool fiber absorber
PTB · Stone & concreteαw0.05
Hollow block with mineral wool and perforation
PTB · Stone & concreteαw0.05
h. full alveol. block-perf. cm 12x25x25+4 air+perf. 12x25x25+3 w.
PTB · Stone & concreteαw0.05
Hollow full alveolar block partition, 8x25x25+4 air+perfor. 12x25x25+3 whitewashed
PTB · Reference surfaceαw0.20
Floors, hollow wooden podium
PTB · Woodαw0.20
0.5 m cavity with 100 mm mineral wool at front of cavity
PTB · Woodαw0.15
wood
PTB · Woodαw0.80
Ceilings, 150 mm "Soundboard" (pressed wood curls with air gaps)
PTB · Woodαw0.70
Acoustic wood panels with acoustic non-woven
PTB · Woodαw0.70
Acoustic wood panels with special plaster
PTB · Reference surfaceαw0.05
Wood, stage floor, 2 layers, 27 mm over airspace
PTB · Reference surfaceαw0.10
Wood, sidewalls, 1 layer, 20 mm w/doors & lighting
PTB · Woodαw0.30
Wood wall bracing with mineral fiber blanket
PTB · Reference surfaceαw0.05
Wood, audience floor, 2 layers, 33 mm on sleepers over concrete
PTB · Reference surfaceαw0.05
chalk limewash smooth wood
PTB · Woodαw0.10