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 2 of 37
PTB · Mineral woolαw0.60
Armstrong San Remo/Cortez perforated mineral fiber acoustic panel
PTB · Mineral woolαw0.65
Armstrong SD Straight Row 9.5mm mineral fiber acoustic panel
PTB · Fabricαw0.60
Armstrong Soundsoak mineral fiber wall panel with needle felt
PTB · Mineral woolαw0.65
Vinyl membrane facing over fiberglass lay-in panel
PTB · Mineral woolαw0.70
Vinyl-film-faced, fiberglass lay-in panel
PTB · Mineral woolαw1.00
Fiberglass lay-in panel with microperforated vinyl facing
PTB · Mineral woolαw0.85
Armstrong Type 2946 microperforated vinyl film-faced fiberglass panel
PTB · Mineral woolαw0.85
Woven glass fibers adhered to fiberglass board, painted
PTB · Fabricαw0.95
Armstrong Type 3105 cloth-faced fiberglass lay-in panel, factory painted
PTB · Fabricαw0.65–0.70
Armstrong Type 3301 cloth-faced fiberglass lay-in panel, painted
PTB · Mineral woolαw0.50
Ceramic and mineral fiber, non-combustible, lay-in panel
PTB · Mineral woolαw0.50–0.55
Fissured mineral fiber, "Cortega" lay-in panel
PTB · Mineral woolαw0.55
Armstrong Type 823 fissured mineral fiber, fire-resistant lay-in panel
PTB · Mineral woolαw0.55
Vinyl-faced fiberglass with vinyl film facing
PTB · Woodαw0.05
3-4 mm asbestos or plywood sheets, >75 mm cavity with 25-50 mm mineral wool
PTB · Woodαw0.05
4 mm asbestos or plywood boards fastened at random intervals (at least 0.4 * 0.6 m), over 75 mm cavity with 25 mm mineral wool
PTB · Stone & concreteαw0.10
Perforated asbestos cement cassette
PTB · Metalαw0.45
Steel deck, perforated webs, absorptive backing
PTB · Metalαw0.75
Steel deck, pan perforated absorptive backing
PTB · Metalαw0.45
ASC Pacific Acustadek N steel deck, perforated webs
PTB · Metalαw0.85
Steel deck, total perforated absorptive backing
PTB · Metalαw0.65
Steel deck, pan perforated absorptive backing
PTB · Fabricαw0.45–0.55
Asona SONAFLEX-GLASS sound-absorbing wallpaper
PTB · Plaster & sprayαw0.45–1.00
Asona Sonaspray K-13 acoustic spray coating
PTB · Plaster & sprayαw0.45–0.70
Asona Sonaspray K-13 FC seamless acoustic coating
PTB · Stone & concreteαw0.55
Asona SOUNDBLOX Helmholtz resonator hollow concrete block
PTB · Stone & concreteαw0.65
Asona Soundblox Helmholtz resonator Type C2
PTB · Stone & concreteαw0.80
Asona Soundblox Helmholtz resonator Type N2-X
PTB · Stone & concreteαw0.55
Asona SOUNDBLOX Helmholtz resonator Type P2
PTB · Stone & concreteαw0.50
Asona Soundblox Type A Helmholtz resonator hollow concrete block
PTB · Stone & concreteαw0.80
Asona SOUNDBLOX Type B Helmholtz Resonator
PTB · Stone & concreteαw0.40
Asona SOUNDBLOX Type C1 Helmholtz resonator made of hollow concrete block
PTB · Stone & concreteαw0.60
Soundblox Type E2 hollow concrete block with Helmholtz resonators
PTB · Reference surfaceαw0.05
exterior walls
PTB · Plaster & sprayαw0.60
BHS Limpet spray-on mineral fiber
PTB · Reference surfaceαw0.15
Exposed brick
PTB · Otherαw0.70
Baffle panels (PROGETTO)
PTB · Plastic & filmαw0.25
Barrisol unperforated matt sheet with 70 mm insulation on ground
PTB · Plastic & filmαw0.15
Unperforated matte sheet without insulation
PTB · Glass & transparentαw0.70
Micro-perforated PVC foil, clamped to an aluminum frame construction
PTB · Glass & transparentαw0.45
Barrisol Microsorber micro-perforated PVC foil
PTB · Plastic & filmαw0.30
Barrisol Miniperf micro-perforated PVC sheet, 0.5 mm holes, 0.5% perforation ratio, spacing 100 mm
PTB · Plastic & filmαw0.40
Barrisol Miniperf micro-perforated PVC sheet, 0.5% open area, spacing 30 mm
PTB · Plastic & filmαw0.15
Barrisol perforated 031 perforated PVC sheet, 4% open area
PTB · Plastic & filmαw0.80
Barrisol perforated PVC sheet, 1 mm holes, 4% perforation ratio
PTB · Plastic & filmαw0.10
Perforated PVC sheet, holes 1 mm, 50000 holes/m², 20% perforation ratio, 100 mm cavity
PTB · Plastic & filmαw0.80
Barrisol perforated PVC sheet, 20% open area, 70 mm mineral fiber backing
PTB · Plastic & filmαw0.10