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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 33 of 37
PTB · Reference: audienceNRC0.80
Chairs, heavily upholstered concert hall chairs, average.
α per m² audience area
PTB · WoodNRC0.10
Sylvatone unperforated (pine wood)
PTB · WoodNRC0.20
Sylvatone VENABLES (modified)
PTB · WoodNRC0.25
Sylvatone - Venables (wood)
PTB · WoodNRC0.80
1 inch Tectum over 1 inch layer of 3 pcf fiberglass
PTB · WoodNRC0.95
1 1/2 inch Tectum over 2 1/2 inch OCF noise barrier batt
PTB · WoodNRC0.85
Tectum Classic film-faced lay-in board
PTB · WoodNRC0.85
Tectum Classic painted nubby lay-in board
PTB · WoodNRC0.85–0.95
Painted Linear lay-in board
PTB · Mineral woolNRC0.80
Tectum Classic Ultimate Nubby lay-in board
PTB · WoodNRC0.40
Hanging panels of 1 inch Tectum, spaced 36 inches face to face
PTB · WoodNRC0.40
Hanging panels of 1 inch Tectum, spaced 12 inch face to face (series 2)
PTB · WoodNRC0.40
Hanging panels of 1 inch Tectum, spaced 24 inches face to face (series 3)
PTB · WoodNRC0.40–1.00
Silicate-treated wood fiber, organic binder
PTB · WoodNRC0.55–0.80
Structural roof deck
PTB · WoodNRC0.60
Tectum II structural roof deck
PTB · WoodNRC0.60
Tectum III structural roof composite
PTB · Mineral woolNRC0.45–0.85
Tectum Kawool ceramic fiber blanket
PTB · WoodNRC0.85
1 inch Tectum over 2 1/2 inch OCF noise barrier batt
PTB · WoodNRC0.95
2 inch Tectum over 1 inch layer of 3 pcf fiberglass
PTB · WoodNRC0.90
1 1/2 inch Tectum over 1 inch layer of 3 pcf fiberglass
PTB · WoodNRC0.90–1.00
2 inch Tectum over 2 1/2 inch OCF noise barrier batt
PTB · WoodNRC1.25
Sound absorption blocks spaced 32 inch on centers
PTB · WoodNRC1.15
Sound absorption blocks spaced 24 inch on centers
PTB · Reference surfaceNRC0.45
telescopic stands
PTB · Reference surfaceNRC0.20
carpet on CLS (g)
PTB · Reference surfaceNRC0.15
Loop pile carpet, surface-treated
PTB · Reference surfaceNRC0.30
Hairy carpet on 3 mm felt (g)
PTB · Reference surfaceNRC0.40
6 mm pile carpet bonded to open-cell foam underlay
PTB · Reference surfaceNRC0.25
6 mm pile carpet bonded to closed-cell foam underlay
PTB · Reference surfaceNRC0.35
carpet with foam below
PTB · Reference surfaceNRC0.30
Loop pile carpet on felt underlay with waffle structure
PTB · Reference surfaceNRC0.30
Carpet, 2 cm, thickness 20 mm
PTB · Reference surfaceNRC0.15
Carpet 6 mm, thickness 6 mm
PTB · Reference surfaceNRC0.15
Carpet, flat, loop pile, 5.3 mm, 1.98 kg/m², 250 Rayl
PTB · Reference surfaceNRC0.50
Carpet, loop pile, on felt underlay
PTB · Reference surfaceNRC0.15
Carpet, loop pile, impregnated base fabric, 4.5 mm, 1.87 kg/m², 820 Rayl
PTB · Reference surfaceNRC0.55
Carpet heavy, on hairfelt or foam rubber
PTB · Reference surfaceNRC0.15
unrope carpet (g)
PTB · Reference surfaceNRC0.40
Carpet: Woven wool loop, 2.3 kg/m², 9.5 mm pile height, no pad
PTB · Reference surfaceNRC0.30
Carpet: Woven wool loop, 1.4 kg/m², 6.4 mm pile height, no pad
PTB · Reference surfaceNRC0.25
Carpet: Woven wool loop, 1.2 kg/m², 2.4 mm pile height, no pad
PTB · Reference surfaceNRC0.15
Moquette floor (B)
PTB · Reference surfaceNRC0.55
Floors, carpet, heavy, over foam rubber
PTB · Reference surfaceNRC0.20
Floors, 10 mm soft carpet on concrete
PTB · Mineral woolNRC0.70
Thermal Ceramics Egi-Dämmplatte EP/V mineral fiber panel
PTB · Mineral woolNRC0.90–1.00
Thyssen Egi-EP/VII mineral fiber insulation board
PTB · FabricNRC0.70