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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 21 of 37
PTB · WoodNRC0.80
MAkustik Type 9/2 MA04 slotted acoustic panel
PTB · Mineral woolNRC0.70
Mat-faced, smooth, HP duct liner
PTB · Mineral woolNRC0.65–0.95
Mat-faced, smooth, duct liner
PTB · Mineral woolNRC0.70–0.90
Mat-faced, smooth, R duct liner (Manville Linacoustic)
PTB · Mineral woolNRC0.65–1.00
Permacote, coated, smooth duct liner
PTB · Mineral woolNRC0.75
Manville Linacoustic Permacote duct liner, spacing 0 mm
PTB · Mineral woolNRC0.80–1.05
Permacote, coated, smooth R-300 duct liner, spacing 0/25 mm
PTB · Mineral woolNRC0.65–0.95
Manville Micro-Aire Type 475 FSK coated duct board
PTB · Mineral woolNRC0.60–1.00
Fiberglass blanket
PTB · Mineral woolNRC0.75–1.00
Manville Spin.Glas Fiberglass Board
PTB · Mineral woolNRC1.10
Manville Spin.Glas fiberglass board, 1000 Series
PTB · Mineral woolNRC1.05
Manville Spin.Glas fiberglass board, Precipitator series
PTB · Mineral woolNRC0.75–0.95
Manville SuperDuct Type 475 FSK, coated duct board
PTB · Mineral woolNRC0.70–1.00
Manville Tuf-Skin semirigid fiberglass blanket
PTB · Reference surfaceNRC—
Marble or glazed tile
PTB · Reference surfaceNRC—
Marble, no air cavity
PTB · Reference surfaceNRC—
Marble floor (B)
PTB · Reference surfaceNRC—
Marble slabs
PTB · WoodNRC0.90
Wood fibers with portland cement binder, with 2 1/2 inch fiberglass batts in cavities between furring
PTB · Reference surfaceNRC0.20
Masonite
PTB · Reference surfaceNRC0.10
Solid wooden door
PTB · OtherNRC—
MATIS MTL plate 12/10
PTB · Stone & concreteNRC0.40
Facing brick masonry with mineral fiber infill
PTB · Reference surfaceNRC0.25
Facing brick masonry, open perpends, 230 x 50 x 55 mm, wall distance 50 mm, spacing 50 mm
PTB · Reference surfaceNRC0.30
Facing brickwork with open perpends, no spacing
PTB · Reference surfaceNRC0.35
Solid brick masonry with open butt joints
PTB · Reference surfaceNRC0.05
Smooth brickwork with flush pointing
PTB · Reference surfaceNRC0.50
Walls, raised bricks with 19 holes directly on stone wall
PTB · FabricNRC0.75
mbakustik curtain Type AV 12, 2-layer, gathered
PTB · FabricNRC0.65
mbakustik Type AV 12 curtain, 2-layer, not easily flammable
PTB · FabricNRC0.75
Drapes, 2-layer, 1.7-fold gathered, 0.45 m from wall, B1 not easily flammable (series 2)
PTB · FabricNRC0.75
mbakustik Curtain Type AV 12, 2-layer, not easily flammable (series 3)
PTB · FabricNRC0.90
mbakustik curtain Type AV 22, 2-layer, B1
PTB · FabricNRC0.85
mbakustik curtain Type AV 22, 2-layer, B1 (series 2)
PTB · FabricNRC1.00
mbakustik curtain Type AV 22, 2-layer, B1 not easily flammable
PTB · FabricNRC0.95
mbakustik drapes Type AV 22, 2-layer, gathered, 0.45 m distance
PTB · FabricNRC1.00
mbakustik curtain Type AV 32, 2-layer
PTB · FabricNRC1.05
mbakustik curtain Type AV 32, 2-layer gathered
PTB · FabricNRC0.95
mbakustik curtain Type AV 32, 2-layer, not easily flammable
PTB · FabricNRC1.00
mbakustik curtain Type AV 32, 2-layer, not easily flammable (series 2)
PTB · MetalNRC0.90
Metal baffle ceiling, aluminum with mineral fiber panel
PTB · MetalNRC0.90
Metal baffle ceiling with mineral fiber panel backing
PTB · MetalNRC0.90
back ceiling TI-Metal holes 2mm + L.M. 30mm
PTB · MetalNRC0.75
Perforated metal ceiling with 30 mm mineral wool
PTB · MetalNRC0.60
Aluminum metal panels with mineral fiber backing
PTB · MetalNRC0.10
metal beams
PTB · Glass & transparentNRC0.25–0.60
Microsorber polycarbonate roll absorber, micro-perforated
PTB · MetalNRC0.45