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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
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PTB · Stone & concreteαw0.25
55 mm perforated bricks on edge, 23% perforation, 50 mm mineral wool
PTB · Reference surfaceαw0.10
degrading limewash (T.R.)
PTB · Otherαw0.45
spaced back ceiling (PROGETTO)
PTB · Feltαw0.80
Absoflex panels "HYGIENE" thickness=0.03 mm
PTB · Feltαw0.60
Absoflex HYGIENE panels
PTB · Feltαw0.90
Absoflex panels "SPORT" (SIP)
PTB · Stone & concreteαw0.55
Acoustile, surface glazed and perforated structural clay tile, perforated surface backed with 4 inch glass fiber blanket of 1 lb/ft² density
PTB · Metalαw0.80
Steel deck, total perforated absorptive backing
PTB · Mineral woolαw0.45–1.00
AF 100 fiberglass insulation blanket
PTB · Otherαw0.50
Acoustic panel with fine slotting / 20 cm air cavity
PTB · Plaster & sprayαw0.20
Acoustic plaster
PTB · Metalαw1.00
Porous sintered metal panel, backed with 2 inch fiberglass
PTB · Metalαw1.00
Almute Type A300c porous sintered metal panel, 2 inch fiberglass backing
PTB · Metalαw1.00
Perforated aluminum panel, with corrugations 5/8 inch deep, 1 1/2 pcf 2 inch fiberglass backing
PTB · Metalαw0.95
Perforated steel panel, 1 1/2 pcf fiberglass backing, 2 inch thick
PTB · Metalαw0.80
Perforated steel panel, 1 1/2 pcf fiberglass backing, 2 inch thick, covered by 3/4 mil PVC
PTB · Mineral woolαw0.35
Aluminum-faced mineral fiber panel with bitumen bond
PTB · Metalαw0.30
Aluminum metal panel with mineral fiber backing, spacing 164 mm
PTB · Metalαw0.35
Aluminum metal panel with mineral fiber backing, spacing 344 mm
PTB · Metalαw0.85
Aluminum baffle ceiling with Sillan acoustic panels
PTB · Reference surfaceαw0.05
Alveolater ceiling AS - global thickness 25.5 cm
PTB · Stone & concreteαw0.05
Alveolated partition 12x45x22.5 cm, F/A = 45% + whitewash
PTB · Stone & concreteαw0.05
alveolated partition cm 8x45x22.5 F/A = 45% + whitewash (series 2)
PTB · Mineral woolαw0.50
AMF Kreuzfresko mineral fiber panel
PTB · Mineral woolαw0.15
AMF Luna mineral fiber panel, unperforated
PTB · Mineral woolαw0.65
AMF Thermatex mineral fiber panel, irregularly perforated
PTB · Mineral woolαw0.50
AMF-Thermatex Feinfresko mineral fiber panel
PTB · Mineral woolαw0.60
AMF-Thermatex Fresko mineral fiber panel
PTB · Mineral woolαw0.50
AMF-Thermatex mineral fiber panel, finely perforated
PTB · Mineral woolαw0.45
AMF-Thermatex mineral fiber panel, fire-resistant
PTB · Mineral woolαw0.50
AMF-Thermatex mineral fiber panel, needled, fire-resistant
PTB · Mineral woolαw0.15
AMF-Thermatex mineral fiber panel, smooth, fire-resistant
PTB · Mineral woolαw0.60
AMF-Thermatex mineral fiber panel, regularly perforated
PTB · Mineral woolαw0.60
Armstrong Aleria mineral fiber acoustic panels, 15 mm
PTB · Mineral woolαw0.25–0.65
Armstrong Celtic perforated mineral fiber acoustic panel, 15 mm
PTB · Mineral woolαw0.55
Armstrong Ceramaguard Travertin mineral fiber acoustic panel
PTB · Mineral woolαw0.65
Armstrong Classic mineral fiber acoustic panels
PTB · Mineral woolαw0.15
Armstrong Dundee/Moderno mineral fiber acoustic panels
PTB · Mineral woolαw0.60
Armstrong Fissured mineral fiber acoustic panels
PTB · Mineral woolαw0.75
Fiberglass panel with perforated vinyl film facing
PTB · Mineral woolαw0.90
Armstrong Minaform S-Quadrat honeycomb system, spacing 140 mm
PTB · Mineral woolαw0.40
Armstrong Minaform S-Quadrat honeycomb system, spacing 200 mm
PTB · Mineral woolαw0.55
Armstrong Minaform S-rectangular honeycomb acoustic system
PTB · Mineral woolαw0.50
Armstrong Minaform S-Rechteck honeycomb system
PTB · Mineral woolαw0.50
Armstrong Minatex surface-textured mineral fiber lay-in panel
PTB · Mineral woolαw0.60
Mineral fiber lay-in panel with factory-applied paint
PTB · Mineral woolαw0.55
Armstrong Type 863 mineral fiber panel with vinyl-aluminum surface
PTB · Mineral woolαw0.40