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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 18 of 37
PTB · Gypsumαw0.20–0.25
Knauf Perllit sound absorber panel No. 73
PTB · Gypsumαw0.45
Knauf Perllit ceiling unit No. 3310 with sound-absorbing filling
PTB · Gypsumαw0.40–0.50
Knauf Perllit ceiling element No. 3350 with mineral fiber filling
PTB · Gypsumαw0.50–0.60
Knauf Perllit-Dekorplatte No. 30, gypsum fiber absorber
PTB · Gypsumαw0.55
Knauf Perllit Sound Absorption Panel No. 71
PTB · Gypsumαw0.40–0.65
Knauf Perllit acoustic tile No. 76
PTB · Gypsumαw0.50–0.55
Knauf Perllit acoustic panel No. 72, grooved, square-hole perforation, 11.4%
PTB · Gypsumαw0.30–0.35
Knauf Perllit acoustic tile No. 74
PTB · Gypsumαw0.50
Knauf Twin D 123 acoustic design panel
PTB · Gypsumαw0.70
Knauf Twin D 123 acoustic design panel, 8/18 perforation
PTB · Gypsumαw0.75
Knauf Twin D 123 acoustic design panel with mineral fiber insulation
PTB · Feltαw0.30
Coconut fiber roll felt, 29 mm, raw paper backed
PTB · Reference surfaceαw0.80
proof constant 0.8
PTB · Foamαw0.15
Plastic, fiberglass reinforced phenolic foam, filled with aluminum hydroxide, faced with very thin layer plywood
PTB · Mineral woolαw0.60
Resin-bonded mineral fiber panel (DNA 1968, a3.2-1)
PTB · Mineral woolαw0.90
Resin-bonded mineral fiber panel (DNA 1968, a3.2-3)
PTB · Mineral woolαw0.70
Resin-bonded mineral fiber panel (DNA 1968, a3.2-7)
PTB · Mineral woolαw0.75
Lam+RockWool Barab
PTB · Foamαw—
Laysa Dekor sk sound absorption mat, PE and PU foam
PTB · Stone & concreteαw0.55
Leca concrete block cavity resonator Sound Leca Normale
PTB · Stone & concreteαw0.65
Leca Sound Architettonico, concrete block with expanded clay
PTB · Reference: audienceαw0.30
Leather arm chair (P)
α per m² audience area
PTB · Reference: audienceαw0.20
Empty chairs, upholstered with leather cover
α per m² audience area
PTB · Reference: audienceαw0.30
Empty chairs, upholstered with cloth cover
α per m² audience area
PTB · Reference: audienceαw0.60
Lightly upholstered concert hall chairs (average)
α per m² audience area
PTB · Reference: audienceαw0.80
Lightly upholstered chair, occupied
α per m² audience area
PTB · Reference: audienceαw0.90
Lightly upholstered chair, occupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Amsterdam, Concertgebouw
α per m² audience area
PTB · Reference: audienceαw0.85
Lightly upholstered chair, occupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Berlin, Konzerthaus
α per m² audience area
PTB · Reference: audienceαw0.80
Lightly upholstered chair, occupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, average (series 2)
α per m² audience area
PTB · Reference: audienceαw0.85
Lightly upholstered chair, occupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Vienna, Gr. Musikvereinssaal (series 3)
α per m² audience area
PTB · Reference: audienceαw0.70
Lightly upholstered chair, unoccupied
α per m² audience area
PTB · Reference: audienceαw0.65
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, average (series 2)
α per m² audience area
PTB · Reference: audienceαw0.50
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Vienna, Gr. Musikvereinssaal (series 3)
α per m² audience area
PTB · Reference: audienceαw0.60
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, average from smoothed curve (series 4)
α per m² audience area
PTB · Reference: audienceαw0.65
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Basel, Stadt-Casino (series 5)
α per m² audience area
PTB · Reference: audienceαw0.60
Lightly upholstered chair, unoccupied, front side of seat back 1.5 cm, rear side of seat back 0, top of seat bottom 2.5 cm, arm rests solid, Amsterdam, Concertgebouw
α per m² audience area
PTB · Fabricαw0.20
light pleated curtains
PTB · Fabricαw0.15
Drapes, light velour, hung straight, in contact with wall
PTB · Fabricαw0.15
Drapes: Light velour 338 g/m² hung straight, in contact with wall
PTB · Woodαw0.45
Lightweight chipboard, 19 mm thick, 5.7 kg/m², 55 Rayl (DNA 1968, a3.1-5)
PTB · Woodαw0.50
Lightweight chipboard (DNA 1968, a3.1-7)
PTB · Woodαw0.65
Lightweight chipboard on cross-battening (DNA 1968, a3.1-6)
PTB · Woodαw0.55
Lightweight chipboard on cross-batten sub-frame (DNA 1968, a3.1-8)
PTB · Woodαw0.80
Lightweight chipboard, porous hard foil on both sides, 35 mm
PTB · Woodαw0.75
Lightweight chipboard with porous hard foil and glass non-woven, spacing 50 mm
PTB · Woodαw0.45
Lightweight chipboard, porous hard foil facing, glass veil backing, 19 mm, no spacing
PTB · Woodαw0.60
Lightweight chipboard with porous hard foil and paper backing, 19 mm
PTB · Fabricαw0.40