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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 · GypsumNRC0.30–0.45
Knauf Perllit sound absorber panel No. 73
PTB · GypsumNRC0.60–0.65
Knauf Perllit ceiling unit No. 3310 with sound-absorbing filling
PTB · GypsumNRC0.55–0.60
Knauf Perllit ceiling element No. 3350 with mineral fiber filling
PTB · GypsumNRC0.65–0.70
Knauf Perllit-Dekorplatte No. 30, gypsum fiber absorber
PTB · GypsumNRC0.70
Knauf Perllit Sound Absorption Panel No. 71
PTB · GypsumNRC0.50–0.65
Knauf Perllit acoustic tile No. 76
PTB · GypsumNRC0.65
Knauf Perllit acoustic panel No. 72, grooved, square-hole perforation, 11.4%
PTB · GypsumNRC0.45–0.55
Knauf Perllit acoustic tile No. 74
PTB · GypsumNRC0.60
Knauf Twin D 123 acoustic design panel
PTB · GypsumNRC0.75
Knauf Twin D 123 acoustic design panel, 8/18 perforation
PTB · GypsumNRC0.75
Knauf Twin D 123 acoustic design panel with mineral fiber insulation
PTB · FeltNRC0.30
Coconut fiber roll felt, 29 mm, raw paper backed
PTB · Reference surfaceNRC0.80
proof constant 0.8
PTB · FoamNRC0.15
Plastic, fiberglass reinforced phenolic foam, filled with aluminum hydroxide, faced with very thin layer plywood
PTB · Mineral woolNRC0.65
Resin-bonded mineral fiber panel (DNA 1968, a3.2-1)
PTB · Mineral woolNRC0.90
Resin-bonded mineral fiber panel (DNA 1968, a3.2-3)
PTB · Mineral woolNRC0.75
Resin-bonded mineral fiber panel (DNA 1968, a3.2-7)
PTB · Mineral woolNRC0.80
Lam+RockWool Barab
PTB · FoamNRC—
Laysa Dekor sk sound absorption mat, PE and PU foam
PTB · Stone & concreteNRC0.65
Leca concrete block cavity resonator Sound Leca Normale
PTB · Stone & concreteNRC0.60
Leca Sound Architettonico, concrete block with expanded clay
PTB · Reference: audienceNRC0.30
Leather arm chair (P)
α per m² audience area
PTB · Reference: audienceNRC0.55
Empty chairs, upholstered with leather cover
α per m² audience area
PTB · Reference: audienceNRC0.75
Empty chairs, upholstered with cloth cover
α per m² audience area
PTB · Reference: audienceNRC0.55
Lightly upholstered concert hall chairs (average)
α per m² audience area
PTB · Reference: audienceNRC0.75
Lightly upholstered chair, occupied
α per m² audience area
PTB · Reference: audienceNRC0.85
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, Amsterdam, Concertgebouw
α per m² audience area
PTB · Reference: audienceNRC0.80
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, Berlin, Konzerthaus
α per m² audience area
PTB · Reference: audienceNRC0.75
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: audienceNRC0.75
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: audienceNRC0.65
Lightly upholstered chair, unoccupied
α per m² audience area
PTB · Reference: audienceNRC0.55
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: audienceNRC0.45
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: audienceNRC0.55
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: audienceNRC0.60
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, Basel, Stadt-Casino (series 5)
α per m² audience area
PTB · Reference: audienceNRC0.60
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 · FabricNRC0.15
light pleated curtains
PTB · FabricNRC0.15
Drapes, light velour, hung straight, in contact with wall
PTB · FabricNRC0.15
Drapes: Light velour 338 g/m² hung straight, in contact with wall
PTB · WoodNRC0.55
Lightweight chipboard, 19 mm thick, 5.7 kg/m², 55 Rayl (DNA 1968, a3.1-5)
PTB · WoodNRC0.50
Lightweight chipboard (DNA 1968, a3.1-7)
PTB · WoodNRC0.65
Lightweight chipboard on cross-battening (DNA 1968, a3.1-6)
PTB · WoodNRC0.60
Lightweight chipboard on cross-batten sub-frame (DNA 1968, a3.1-8)
PTB · WoodNRC0.80
Lightweight chipboard, porous hard foil on both sides, 35 mm
PTB · WoodNRC0.70
Lightweight chipboard with porous hard foil and glass non-woven, spacing 50 mm
PTB · WoodNRC0.60
Lightweight chipboard, porous hard foil facing, glass veil backing, 19 mm, no spacing
PTB · WoodNRC0.60
Lightweight chipboard with porous hard foil and paper backing, 19 mm
PTB · FabricNRC0.35