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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 9 of 37
PTB · Woodαw0.70–0.75
ESO-Akustik Modulator 22/3 ceiling facing, plywood strips
PTB · Foamαw0.55
Expanded polyurethane damping PAE 50 mm
PTB · Foamαw0.20
Faist Automotive empfa-Dämmstoff M 638 polyether foam absorber
PTB · Foamαw0.25
Faist Automotive empfa-Dämmstoff M 927 polyether foam absorber
PTB · Foamαw0.25
Faist empfa-Dämmstoff M 1063 (polyether foam composite)
PTB · Foamαw0.30
Faist empfa-Dämmstoff M 1135 convoluted foam
PTB · Foamαw0.10
Porous absorber, 15 mm polyether foam, 1.5 mm thermoplastic facing
PTB · Foamαw0.20
Faist empfa-Dämmstoff M 507/20/1.5 polyether foam
PTB · Mineral woolαw—
Fiberboard, 1/2 inch normal soft, mounted over 1 inch air space
PTB · Reference surfaceαw0.10
Windows, aa
PTB · Reference surfaceαw0.05
Windows, window glass, big thick panes
PTB · Reference surfaceαw0.05
Windows, double 3 mm glass / 10 mm distance
PTB · Reference surfaceαw0.05
Windows, double 3 mm glass / 30 mm distance
PTB · Reference surfaceαw0.10
Windows, window glass
PTB · Reference surfaceαw0.05
Windows, heavy glass
PTB · Reference surfaceαw0.10
Glass: Ordinary window glass
PTB · Feltαw0.50–0.80
Fiberform 62T polyester mat
PTB · Otherαw0.55
Fibermatis ceiling tile, 40 mm
PTB · Otherαw0.45
FiberMatis fiberboard, 20 mm
PTB · Mineral woolαw0.40–0.95
Duct liner, perforated foil facing
PTB · Woodαw0.45–0.60
wood fibers with portland cement binder
PTB · Woodαw0.10
Spruce wood paneling, slotted with fiberboard tongues
PTB · Woodαw0.20
Spruce wood paneling, slotted, with mineral fiber mat
PTB · Woodαw0.15
Spruce wood paneling, slotted, 10 mm slots, mineral fiber backing
PTB · Stone & concreteαw0.10
Flexboard, 3/16 inch unperforated cement asbestos board mounted over 2 inch air cavity
PTB · Mineral woolαw0.80–0.85
Flumroc 341 stone wool roof insulation board
PTB · Mineral woolαw0.65–1.00
Flumroc Ecco stone wool insulation panel
PTB · Mineral woolαw0.70–0.95
Flumroc Iglu mineral fiber insulation board
PTB · Stone & concreteαw0.85
Fonoleca nervato concrete block with expanded clay as cavity resonator
PTB · Metalαw0.30–0.35
Fraunhofer IBP micro-perforated metal cassette
PTB · Glass & transparentαw0.60
Fraunhofer IBP micro-perforated polycarbonate foil absorber
PTB · Metalαw0.35
Fraunhofer IBP VPR-A1 compound plate resonator with Basotect
PTB · Metalαw0.30
Fraunhofer IBP VPR-A1 compound plate resonator with ISO-Bond filling
PTB · Mineral woolαw0.75
G+H SONO R horizontal interaxis 50 cm
PTB · Mineral woolαw0.90
Bonded mineral fiber panel, 30 mm thick, 50 mm wall distance, spacing 50 mm
PTB · Mineral woolαw0.50
Mineral fiber panel, surface-treated on both sides, 20 mm
PTB · Mineral woolαw0.75
Mineral fiber panel, fine-pored spray finish, 20 mm, spacing 50 mm
PTB · Mineral woolαw0.65
Bonded mineral fiber panel, fine-pored spray finish, 20 mm, no spacing
PTB · Mineral woolαw0.85
Bonded mineral fiber panel, surface-treated on both sides, spacing 100 mm
PTB · Mineral woolαw0.90
Bonded mineral fiber panel, surface-treated, spacing 200 mm
PTB · Mineral woolαw0.75
Bonded mineral fiber panel, 12 Rayl/cm, 30 mm thick, no spacing
PTB · Plastic & filmαw0.50
Folded PVC plastic film
PTB · Fabricαw0.70
Folded linen-textured fabric (rayon, linen, cotton)
PTB · Gypsumαw0.50
Walls, perforated 13 mm gypsum board (11%), d = 5 mm, on studs and mineral wool
PTB · Stone & concreteαw0.65
Perforated asbestos cement cassette with non-woven fiber
PTB · Gypsumαw0.05
Perforated drywall cassette with glass veil (DNA 1968, b2.1-10)
PTB · Gypsumαw0.10
Perforated gypsum board cassette with glass veil (DNA 1968, b2.1-9)
PTB · Gypsumαw0.70