Sound Absorption Coefficients
 2018年08月09日

Table of Sound Absorption Coefficients that can be found on internet.

Wwise factory reflect acoustic textures

wwise reflect:
可直接编辑 \Authoring\x64\Release\bin\plugins\AkReflect.xml 文件，更改 BaseTextureFrequency 的 Default Value。这样会定义新的最低分频点（默认250 Hz），其他分频点将按照两个八度的间隔连续排布。

Material < 250 Hz 250 Hz ~ 1,000 Hz 1,000 Hz ~ 4,000 Hz > 4,000 Hz
Acoustic_Banner 0.37 1 1 1
Anechoic 1 1 1 1
Brick 0.12 0.18 0.23 0.35
Carpet 0.46 0.45 0.76 1
Concrete 0.06 0.06 0.06 0.14
Cork_Tiles 0.14 0.3 0.73 1
Curtains 0.07 0.6 0 0.84
Drywall 0.02 0.02 0.02 0.02
Fabric 0.03 0.13 0.48 0.72
Mountain 0 0 0 0
Tile 0.67 0.41 0.12 0
Wood 0.32 0.25 0.2 0.35
Wood_Bright 0.32 0.25 0.1 0.09
Wood_Deep 0.01 0.08 0.2 0.35

Table from phy-astr.gsu.edu

Material 125 250 500 1000 2000 4000
Acoustic tile, rigid mount 0.2 0.4 0.7 0.8 0.6 0.4
Acoustic tile, suspended 0.5 0.7 0.6 0.7 0.7 0.5
Acoustical plaster 0.1 0.2 0.5 0.6 0.7 0.7
Ordinary plaster, on lath 0.2 0.15 0.1 0.05 0.04 0.05
Gypsum wallboard, 1/2” on studs 0.3 0.1 0.05 0.04 0.07 0.1
Plywood sheet, 1/4” on studs 0.6 0.3 0.1 0.1 0.1 0.1
Concrete block, unpainted 0.4 0.4 0.3 0.3 0.4 0.3
Concrete block, painted 0.1 0.05 0.06 0.07 0.1 0.1
Concrete, poured 0.01 0.01 0.02 0.02 0.02 0.03
Brick 0.03 0.03 0.03 0.04 0.05 0.07
Vinyl tile on concrete 0.02 0.03 0.03 0.03 0.03 0.02
Heavy carpet on concrete 0.02 0.06 0.15 0.4 0.6 0.6
Heavy carpet on felt backing 0.1 0.3 0.4 0.5 0.6 0.7
Platform floor, wooden 0.4 0.3 0.2 0.2 0.15 0.1
Ordinary window glass 0.3 0.2 0.2 0.1 0.07 0.04
Heavy plate glass 0.2 0.06 0.04 0.03 0.02 0.02
Draperies, medium velour 0.07 0.3 0.5 0.7 0.7 0.6
Upholstered seating, unoccupied 0.2 0.4 0.6 0.7 0.6 0.6
Upholstered seating, occupied 0.4 0.6 0.8 0.9 0.9 0.9
Wood seating, unoccupied 0.02 0.03 0.03 0.06 0.06 0.05
Wooden pews, occupied 0.4 0.4 0.7 0.7 0.8 0.7

Table from Auralization:

Type Material 125 250 500 1k 2k 4k 8k
Massive constructions and hard surfaces Walls, hard surfaces average (brick walls, plaster, hard floors, etc.) 0.02 0.02 0.03 0.03 0.04 0.05 0.05
  Walls, rendered brickwork 0.01 0.02 0.02 0.03 0.03 0.04 0.04
  Rough concrete 0.02 0.03 0.03 0.03 0.04 0.07 0.07
  Smooth unpainted concrete 0.01 0.01 0.02 0.02 0.02 0.05 0.05
  Rough lime wash 0.02 0.03 0.04 0.05 0.04 0.03 0.02
  Smooth brickwork with flush pointing, painted 0.01 0.01 0.02 0.02 0.02 0.02 0.02
  Smooth brickwork, 10 mm deep pointing, pit sand mortar 0.08 0.09 0.12 0.16 0.22 0.24 0.24
  Brick wall, stuccoed with a rough finish 0.03 0.03 0.03 0.04 0.05 0.07 0.07
  Ceramic tiles with a smooth surface 0.01 0.01 0.01 0.02 0.02 0.02 0.02
  Limestone walls 0.02 0.02 0.03 0.04 0.05 0.05 0.05
  Reverberation chamber walls 0.01 0.01 0.01 0.02 0.02 0.04 0.04
  Concrete floor 0.01 0.03 0.05 0.02 0.02 0.02 0.02
  Marble floor 0.01 0.01 0.01 0.02 0.02 0.02 0.02
Lightweight constructions and linings 2 * 13 mm plasterboard on steel frame, 50 mm mineral wool in cavity, surface painted 0.15 0.1 0.06 0.04 0.04 0.05 0.05
  Wooden lining, 12 mm fixed on frame 0.27 0.23 0.22 0.15 0.1 0.07 0.06
Glazing Single pane of glass, 3 mm 0.08 0.04 0.03 0.03 0.02 0.02 0.02
  Glass window, 0.68 kg/m2 Lead glazing 0.1 0.05 0.04 0.03 0.03 0.03 0.03
  Lead glazing 0.3 0.2 0.14 0.1 0.05 0.05 –
  Double glazing, 2–3 mm glass, > 30 mm gap 0.15 0.05 0.03 0.03 0.02 0.02 0.02
  Double glazing, 2–3 mm glass, 10 mm gap 0.1 0.07 0.05 0.03 0.02 0.02 0.02
  Double glazing, lead on the inside 0.15 0.3 0.18 0.1 0.05 0.05 –
Wood Wood, 1.6 cm thick, on 4 cm wooden planks 0.18 0.12 0.10 0.09 0.08 0.07 0.07
  Thin plywood panelling 0.42 0.21 0.10 0.08 0.06 0.06 –
  16 mm wood on 40 mm studs 0.18 0.12 0.10 0.09 0.08 0.07 0.07
  Audience floor, 2 layers, 33 mm on sleepers over concrete 0.09 0.06 0.05 0.05 0.05 0.04 –
  Wood, stage floor, 2 layers, 27 mm over airspace 0.10 0.07 0.06 0.06 0.06 0.06 –
  Solid wooden door 0.14 0.10 0.06 0.08 0.10 0.10 0.10
Floor coverings Linoleum, asphalt, rubber, or cork tile on concrete 0.02 0.03 0.03 0.03 0.03 0.02 –
  Cotton carpet 0.07 0.31 0.49 0.81 0.66 0.54 0.48
  Loop pile tufted carpet, 1.4 kg/m2, 9.5 mm pile height: On hair pad, 3.0 kg/m2 0.10 0.40 0.62 0.70 0.63 0.88 –
  Thin carpet, cemented to concrete 0.02 0.04 0.08 0.20 0.35 0.40 –
  6 mm pile carpet bonded to closed-cell foam underlay 0.03 0.09 0.25 0.31 0.33 0.44 0.44
  6 mm pile carpet bonded to open-cell foam underlay 0.03 0.09 0.20 0.54 0.70 0.72 0.72
  9 mm tufted pile carpet on felt underlay 0.08 0.08 0.30 0.60 0.75 0.80 0.80
  Needle felt 5 mm stuck to concrete 0.02 0.02 0.05 0.15 0.30 0.40 0.40
  10 mm soft carpet on concrete 0.09 0.08 0.21 0.26 0.27 0.37 –
  Hairy carpet on 3 mm felt 0.11 0.14 0.37 0.43 0.27 0.25 0.25
  5 mm rubber carpet on concrete 0.04 0.04 0.08 0.12 0.10 0.10 –
  Carpet 1.35 kg/m2, on hair felt or foam rubber 0.08 0.24 0.57 0.69 0.71 0.73 –
  Cocos fibre roll felt, 29 mm thick (unstressed), reverse side clad with paper, 2.2 kg/m2, 2 Rayl 0.10 0.13 0.22 0.35 0.47 0.57 –
Curtains Cotton curtains (0.5 kg/m2) draped to 3/4 area approx. 130 mm from wall 0.30 0.45 0.65 0.56 0.59 0.71 0.71
  Curtains (0.2 kg/m2) hung 90 mm from wall 0.05 0.06 0.39 0.63 0.70 0.73 0.73
  Cotton cloth (0.33 kg/m2) folded to 7/8 area 0.03 0.12 0.15 0.27 0.37 0.42 –
  Densely woven window curtains 90 mm from wall 0.06 0.10 0.38 0.63 0.70 0.73 –
  Vertical blinds, 15 cm from wall, half opened (45°) 0.03 0.09 0.24 0.46 0.79 0.76 –
  Vertical blinds, 15 cm from wall, open (90°) 0.03 0.06 0.13 0.28 0.49 0.56 –
  Tight velvet curtains 0.05 0.12 0.35 0.45 0.38 0.36 0.36
  Curtain fabric, 15 cm from wall 0.10 0.38 0.63 0.52 0.55 0.65 –
  Curtain fabric, folded, 15 cm from wall 0.12 0.60 0.98 1.0 1.0 1.0 1.0
  Curtains of close-woven glass mat hung 50 mm from wall 0.03 0.03 0.15 0.40 0.50 0.50 0.50
  Studio curtains, 22 cm from wall 0.36 0.26 0.51 0.45 0.62 0.76 –
Seating (2 seats per m2) Wooden chairs without cushion 0.05 0.08 0.10 0.12 0.12 0.12 –
  Unoccupied plastic chairs 0.06 0.10 0.10 0.20 0.30 0.20 0.20
  Medium upholstered concert chairs, empty 0.49 0.66 0.80 0.88 0.82 0.70 –
  Heavily upholstered seats, unoccupied 0.70 0.76 0.81 0.84 0.84 0.81 –
  Empty chairs, upholstered with cloth cover 0.44 0.60 0.77 0.89 0.82 0.70 0.70
  Empty chairs, upholstered with leather cover 0.40 0.50 0.58 0.61 0.58 0.50 0.50
  Unoccupied, moderately upholstered chairs (0.90 m × 0.55 m) 0.44 0.56 0.67 0.74 0.83 0.87 –
Audience (unless not specified explicitly, 2 persons per m2) Areas with audience, orchestra or choir including narrow aisles 0.60 0.74 0.88 0.96 0.93 0.85 0.85
  Audience on wooden chairs, 1 per m2 0.16 0.24 0.56 0.69 0.81 0.78 0.78
  Audience on wooden chairs, 2 per m2 0.24 0.40 0.78 0.98 0.96 0.87 0.87
  Orchestra with instruments on podium, 1.5 m2 per person 0.27 0.53 0.67 0.93 0.87 0.80 0.80
  Audience area, 0.72 persons / m2 0.10 0.21 0.41 0.65 0.75 0.71 –
  Audience area, 1 person / m2 0.16 0.29 0.55 0.80 0.92 0.90 –
  Audience area, 1.5 persons / m2 0.22 0.38 0.71 0.95 0.99 0.99 –
  Audience area, 2 persons / m2 0.26 0.46 0.87 0.99 0.99 0.99 –
  Audience in moderately upholstered chairs 0,85 m × 0,63 m 0.72 0.82 0.91 0.93 0.94 0.87 –
  Audience in moderately upholstered chairs 0,90 m × 0,55 m 0.55 0.86 0.83 0.87 0.90 0.87 –
Wall absorbers Fabric-covered panel, 6 pcf rockwool core 0.46 0.93 1.0 1.0 1.0 1.0 1.0
  Fabric-covered panel, 8 pcf rockwool core 0.21 0.66 1.0 1.0 0.97 0.98 0.98
  Facing-brick brickwork, open butt joins, brick dimensions 230 × 50 × 55 mm 0.04 0.14 0.49 0.35 0.31 0.36 –
  Acoustical plaster, approx. 25 mm thick, 3.5 kg/m2/cm 0.17 0.36 0.66 0.65 0.62 0.68 –
  Rockwool thickness = 50 mm, 80 kg/m3 0.22 0.6 0.92 0.90 0.88 0.88 0.88
  Rockwool thickness = 50 mm, 40 kg/m3 0.23 0.59 0.86 0.86 0.86 0.86 086
  50 mm mineral wool (40 kg/m3), glued to wall, untreated surface 0.15 0.70 0.60 0.60 0.85 0.90 0.90
  50 mm mineral wool (70 kg/m3) 300 mm in front of wall 0.70 0.45 0.65 0.60 0.75 0.65 0.65
  Gypsum board, perforation 19.6%, hole diameter 15 mm, backed by fibrous web 12 Rayl, 100 mm cavity filled with mineral fibre mat 1,05 kg/m2, 7,5 Rayl 0.30 0.69 1.0 0.81 0.66 0.62 –
  Perforated veneered chipboard, 50 mm, 1 mm holes, 3 mm spacing, 9% hole surface ratio, 150 mm cavity filled with 30 mm mineral wool 0.41 0.67 0.58 0.59 0.68 0.35 –
  Fibre absorber, mineral fibre, 20 mm thick, 3.4 kg/m2, 50 mm cavity 0.20 0.56 0.82 0.87 0.70 0.53 –
  Fibre absorber, mats of porous flexible fibrous web fabric, self-extinguishing 0.07 0.07 0.2 0.41 0.75 0.97 –
Ceiling absorbers Plasterboard ceiling on battens with large air-space above 0.20 0.15 0.10 0.08 0.04 0.02 –
  Fibre absorber on perforated sheet metal cartridge, 0,5 mm zinc-plated steel, 1.5 mm hole diameter, 200 mm cavity filled with 20 mm mineral wool (20 kg/m3), inflammable 0.48 0.97 1.0 0.97 1.0 1.0 1.0
  Fissured ceiling tile 0.49 0.53 0.53 0.75 0.92 0.99 –
  Perforated 27 mm gypsum board (16%), d = 4,5 mm, 300 mm from ceiling 0.45 0.55 0.60 0.90 0.86 0.75 –
  Wedge-shaped, melamine foam, ceiling tile 0.12 0.33 0.83 0.97 0.98 0.95 –
  Metal panel ceiling, backed by 20 mm Sillan acoustic tiles, panel width 85 mm, panel spacing 15 mm, cavity 35 cm 0.59 0.80 0.82 0.65 0.27 0.23  
Special absorbers Microperforated foil “Microsorber” (Kaefer) 0.06 0.28 0.70 0.68 0.74 0.53 –
  Microperforated glass sheets, 5 mm cavity 0.10 0.45 0.85 0.30 0.10 0.05 –
  Hanging absorber panels (foam), 400 mm depth, 400 mm distance 0.25 0.45 0.80 0.90 0.85 0.80 –
  Hanging absorber panels (foam), 400 mm depth, 700 mm distance 0.20 0.30 0.60 0.75 0.70 0.70 –

Table from www.akustik.ua

Type Material Thickness 125 250 500 1000 2000 4000
Masonry Walls Rough concrete   0.02 0.03 0.03 0.03 0.04 0.07
  Smooth unpainted concrete   0.01 0.01 0.02 0.02 0.02 0.05
  Smooth concrete, painted or glazed   0.01 0.01 0.01 0.02 0.02 0.02
  Porous concrete blocks (no surface finish)   0.05 0.05 0.05 0.08 0.14 0.2
  Clinker concrete (no surface finish)   0.10 0.20 0.40 0.60 0.50 0.60
  Smooth brickwork with flush pointing   0.02 0.03 0.03 0.04 0.05 0.07
  Smooth brickwork with flush pointing, painted   0.01 0.01 0.02 0.02 0.02 0.02
  Standard brickwork   0.05 0.04 0.02 0.04 0.05 0.05
  Brickwork, 10mm flush pointing   0.08 0.09 0.12 0.16 0.22 0.24
  Lime cement plaster on masonry wall   0.02 0.02 0.03 0.04 0.05 0.05
  Glaze plaster on masonry wall   0.01 0.01 0.01 0.02 0.02 0.02
  Painted plaster surface on masonry wall   0.02 0.02 0.02 0.02 0.02 0.02
  Plaster on masonry wall with wall paper on backing paper   0.02 0.03 0.04 0.05 0.07 0.08
  Ceramic tiles with smooth surface   0.01 0.01 0.01 0.02 0.02 0.02
  Breeze block   0.20 0.45 0.60 0.40 0.45 0.40
  Plaster on solid wall   0.04 0.05 0.06 0.08 0.04 0.06
  Plaster, lime or gypsum on solid backing   0.03 0.03 0.02 0.03 0.04 0.05
Studwork And Lightweight Walls Plasterboard on battens, 18mm airspace with glass wool   0,30 0,20 0,15 0,05 0,05 0,05
  Plasterboard on frame, 100mm airspace   0,30 0,12 0,08 0,06 0,06 0,05
  Plasterboard on frame, 100mm airspace with glass wool   0,08 0,11 0,05 0,03 0,02 0,03
  Plasterboard on 50mm battens   0,29 0,10 0,05 0,04 0,07 0,09
  Plasterboard on 25mm battens   0,31 0,33 0,14 0,10 0,10 0,12
  2 x plasterboard on frame, 50mm airspace with mineral wool 2 x 13mm 0,15 0,10 0,06 0,04 0,04 0,05
  Plasterboard on cellular core partition   0,15 0,00 0,07 0,00 0,04 0,05
  Plasterboard on frame 100mm cavity 13mm 0,08 0,11 0,05 0,03 0,02 0,03
  Plasterboard on frame, 100mm cavity with mineral wool 13mm 0,30 0,12 0,08 0,06 0,06 0,05
  2 x 13mm plasterboard on steel frame, 50mm mineral wool in cavity, surface painted 26mm 0,15 0,01 0,06 0,04 0,04 0,05
Glass And Glazing 4mm glass 4mm 0,30 0,20 0,10 0,07 0,05 0,02
  6mm glass 6mm 0,10 0,06 0,04 0,03 0,02 0,02
  Double glazing, 2-3mm glass, 10mm air gap   0,15 0,05 0,03 0,03 0,02 0,02
Wood And Wood Panelling 3-4mm plywood, 75mm cavity containing mineral wool 1 0,5 0,3 0,1 0,05 0,05 0,05
  5mm plywood on battens, 50mm airspace filled   0,40 0,35 0,20 0,15 0,05 0,05
  12mm plywood over 50mm airgap 1 0,25 0,05 0,04 0,03 0,03 0,02
  12mm plywood over 150mm airgap 1 0,28 0,08 0,07 0,07 0,09 0,09
  12mm plywood over 200mm airgap containing 50mm mineral wool 1 0,14 0,10 0,10 0,08 0,10 0,08
  Plywood mounted solidly   0,05   0,05   0,05 0,05
  12mm plywood in framework with 30mm airspace behind 12mm 0,35 0,20 0,15 0,10 0,05 0,05
  12mm plywood in framework with 30mm airspace containing glass wool 12mm 0,40 0,20 0,15 0,10 0,10 0,05
  Plywood, hardwood panels over 25mm airspace on solid backing   0,30 0,20 0,15 0,10 0,10 0,05
  Plywood, hardwood panels over 25mm airspace on solid backing with absorbent material in air space   0,40 0,25 0,15 0,10 0,10 0,05
  12mm wood panelling on 25mm battens 12mm 0,31 0,33 0,14 0,10 0,10 0,12
  Timber boards, 100mm wide, 10mm gaps, 500mm airspace with mineral wool 22mm 0,05 0,25 0,60 0,15 0,05 0,10
  t & g board on frame, 50mm airspace with mineral wool 16mm 0,25 0,15 0,10 0,09 0,08 0,07
  16-22mm t&g wood on 50mm cavity filled with mineral wool   0,25 0,15 0,1 0,09 0,08 0,07
  Cedar, slotted and profiled on battens mineral wool in airspace   0,20 0,62 0,98 0,62 0,21 0,15
  Wood boards on on joists or battens   0,15 0,20 0,10 0,10 0,10 0,10
  20mm dense veneered chipboard over 100mm airgap   0,03 0,05 0,04 0,03 0,03 0,02
  20mm dense veneered chipboard over 200mm airgap   0,06 0,10 0,08 0,09 0,07 0,04
  20mm dense veneered chipboard over 250mm airgap containing 50mm mineral wool   0,12 0,10 0,08 0,07 0,10 0,08
  6mm wood fibre board, cavity > 100mm, empty   0,3 0,2 0,2 0,1 0,05 0,05
  22mm chipboard, 50mm cavity filled with mineral wool   0,12 0,04 0,06 0,05 0,05 0,05
  Acoustic timber wall panelling   0,18 0,34 0,42 0,59 0,83 0,68
  Hardwood, mahogany   0,19 0,23 0,25 0,30 0,37 0,42
  Chipboard on 16mm battens 20mm 0,20 0,25 0,20 0,20 0,15 0,20
  Chipboard on frame, 50mm airspace with mineral wool 22mm 0,12 0,04 0,06 0,05 0,05 0,05
Mineral Wool And Foams Melamine based foam 25mm   0,09 0,22 0,54 0,76 0,88 0,93
  Melamine based foam 50mm   0,18 0,56 0,96 1,00 1,00 1,00
  Glass wool 25mm 16 kg/m3   0,12 0,28 0,55 0,71 0,74 0,83
  Glass wool 50mm, 16 kg/m3   0,17 0,45 0,80 0,89 0,97 0,94
  Glass wool 75mm, 16 kg/m3   0,30 0,69 0,94 1,00 1,00 1,00
  Glass wool 100mm, 16 kg/m3   0,43 0,86 1,00 1,00 1,00 1,00
  Glass wool 25mm, 24 kg/m3   0,11 0,32 0,56 0,77 0,89 0,91
  Glass wool 50mm, 24 kg/m3   0,27 0,54 0,94 1,00 0,96 0,96
  Glass wool 75mm, 24 kg/m3   0,28 0,79 1,00 1,00 1,00 1,00
  Glass wool 100mm, 24 kg/m3   0,46 1,00 1,00 1,00 1,00 1,00
  Glass wool 50mm, 33 kg/m3   0,20 0,55 1,00 1,00 1,00 1,00
  Glass wool 75mm, 33 kg/m3   0,37 0,85 1,00 1,00 1,00 1,00
  Glass wool 100mm, 33 kg/m3   0,53 0,92 1,00 1,00 1,00 1,00
  Glass wool 50mm, 48 kg/m3   0,30 0,80 1,00 1,00 1,00 1,00
  Glass wool 75mm, 48 kg/m3   0,43 0,97 1,00 1,00 1,00 1,00
  Glass wool 100mm, 48 kg/m3   0,65 1,00 1,00 1,00 1,00 1,00
  Rock wool 50mm, 33 kg/m3 direct to masonry 17 0,15 0,60 0,90 0,90 0,90 0,85
  Rock wool 100mm, 33 kg/m3 direct to masonry 17 0,35 0,95 0,98 0,92 0,90 0,85
  Rock wool 50mm, 60 kg/m3 direct to masonry 17 0,11 0,60 0,96 0,94 0,92 0,82
  Rock wool 75mm, 60 kg/m3 direct to masonry 17 0,34 0,95 0,98 0,82 0,87 0,86
  Rock wool 30mm, 100 kg/m3 direct to masonry 17 0,10 0,40 0,80 0,90 0,90 0,90
  Rock wool 30mm, 200 kg/m3 over 300mm air gap 17 0,40 0,75 0,90 0,80 0,90 0,85
  Glass wool or mineral wool on solid backing 25mm 0,20 0,00 0,70 0,00 0,90 0,80
  Glass wool or mineral wool on solid backing 50mm 0,30 0,00 0,80 0,00 0,95 0,90
  Glass wool or mineral wool over air space on solid backing 25mm 0,40 0,00 0,80 0,00 0,90 0,80
  Fibreglass super fine mat 50mm 0,15 0,40 0,75 0,85 0,80 0,85
  Fibreglass scrim-covered sewn sheet 40mm 0,40 0,80 0,95 0,95 0,80 0,85
  Fibreglass bitumen bonded mat 25mm 0,10 0,35 0,50 0,55 0,70 0,70
  Fibreglass bitumen bonded mat 50mm 0,30 0,55 0,80 0,85 0,75 0,80
  Fibreglass resin-bonded mat 25mm 0,10 0,35 0,55 0,65 0,75 0,80
  Fibreglass resin-bonded mat 50mm 0,20 0,50 0,70 0,80 0,75 0,80
  Fibreglass resin-bonded board 25mm 0,10 0,25 0,55 0,70 0,80 0,85
  Flexible polyurethane foam 50mm   0,25 0,50 0,85 0,95 0,90 0,90
  Rigid polyurethane foam 50mm   0,20 0,40 0,65 0,55 0,70 0,70
  12mm expanded polystyrene on 45mm battens   0,05 0,15 0,40 0,35 0,20 0,20
  25mm expanded polystyrene on 50mm battens   0,10 0,25 0,55 0,20 0,10 0,15
Wall Treatments & Constructions Cork tiles 25mm on solid backing   0,05 0,10 0,20 0,55 0,60 0,55
  Cork board, 25mm on solid backing 25mm 0,03 0,05 0,17 0,52 0,50 0,52
  Cork board, 25mm, 2.9kg/m2, on battens 25mm 0,15 0,40 0,65 0,35 0,35 0,30
  Glass blocks or glazed tiles as wall finish   0,01 0,00 0,01 0,00 0,01 0,01
  Muslin covered cotton felt 25mm 0,15 0,45 0,70 0,85 0,95 0,85
  Pin up boarding- medium hardboard on solid backing   0,05 0,00 0,10 0,00 0,10 0,10
  Fibreboard on solid backing 12mm 0,05 0,10 0,15 0,25 0,30 0,30
  25mm thick hair felt, covered by scrim cloth on solid backing 25mm 0,10 0,00 0,70 0,00 0,80 0,80
  Fibreboard on solid backing soft 12mm 0,05 0,00 0,15 0,00 0,30 0,30
  Fibreboard on solid backing - painted   0,05 0,00 0,10 0,00 0,15 0,15
  Fibreboard over airspace on solid wall 12mm 0,30 0,00 0,30 0,00 0,30 0,30
  Fibreboard over airspace on solid wall - painted   0,30 0,00 0,15 0,00 0,10 0,10
  Plaster on lath, deep air space   0,20 0,15 0,10 0,05 0,05 0,05
  Plaster decorative panels, walls   0,20 0,15 0,10 0,08 0,04 0,02
  Acoustic plaster to solid backing 25mm 0,03 0,15 0,50 0,80 0,85 0,80
  9mm acoustic plaster to solid backing 9mm 0,02 0,08 0,30 0,60 0,80 0,90
  9mm acoustic plaster on plasterboard, 75mm airspace 9mm 0,30 0,30 0,60 0,8 0,75 0,75
  12.5mm acoustic plaster on plaster backing over 75mm air space 12.5mm 0,35 0,35 0,40 0,55 0,70 0,70
  Woodwool slabs, unplastered on solid backing 25mm 0,10 0,00 0,40 0,00 0,60 0,60
  Woodwool slabs, unplastered on solid backing 50mm 0,10 0,20 0,45 0,80 0,60 0,75
  Woodwool slabs, unplastered on solid backing 75mm 0,20 0,00 0,80 0,00 0,80 0,80
  Woodwool slabs, unplastered over 20mm airspace on solid backing 25mm 0,15 0,00 0,60 0,00 0,60 0,70
  Plasterboard backed with 25mm thick bitumen-bonded fibreglass on 50mm battens 10mm 0,30 0,20 0,15 0,05 0,05 0,05
  Curtains hung in folds against soild wall   0,05 0,15 0,35 0,40 0,50 0,50
  Cotton Curtains (0.5kg/m2),draped to 75% area approx. 130mm from wall   0,30 0,45 0,65 0,56 0,59 0,71
  Lightweight curtains (0.2 kg/m2) hung 90mm from wall   0,05 0,06 0,39 0,63 0,70 0,73
  Curtains of close-woven glass mat hung 50mm from wall   0,03 0,03 0,15 0,40 0,50 0,50
  Curtains, medium velour, 50% gather, over soild backing   0,05 0,25 0,40 0,50 0,60 0,50
  Curtains (medium fabrics) hung straight and close to wall   0,05 0,00 0,25 0,00 0,30 0,40
  Curtains in folds against wall   0,05 0,15 0,35 0,40 0,50 0,50
  Curtains ( medium fabrics ) double widths in folds spaced away from wall   0,10 0,00 0,40 0,00 0,50 0,60
  Acoustic banner, 0.5 kg/m2 wool serge, 100mm from wall   0,11 0,40 0,70 0,74 0,88 0,89
Floors Smooth marble or terrazzo slabs   0,01 0,01 0,01 0,01 0,02 0,02
  Raised computer floor, steel-faced 45mm chipboard 800mm above concrete floor, no carpet   0,08 0,07 0,06 0,07 0,08 0,08
  Raised computer floor, steel-faced 45mm chipboard 800mm above concrete floor, office-grade carpet tiles   0,27 0,26 0,52 0,43 0,51 0,58
  Wooden floor on joists   0,15 0,11 0,10 0,07 0,06 0,07
  Parquet fixed in asphalt, on concrete   0,04 0,04 0,07 0,06 0,06 0,07
  Parquet on counterfloor   0,20 0,15 0,10 0,10 0,05 0,10
  Linoleum or vinyl stuck to concrete   0,02 0,02 0,03 0,04 0,04 0,05
  Layer of rubber, cork, linoleum + underlay, or vinyl+underlay stuck to concrete   0,02 0,02 0,04 0,05 0,05 0,10
  5mm needle-felt stuck to concrete 5mm 0,01 0,02 0,05 0,15 0,30 0,40
  6mm pile carpet bonded to closed-cell foam underlay 6mm 0,03 0,09 0,25 0,31 0,33 0,44
  6mm pile carpet bonded to open-cell foam underlay 6mm 0,03 0,09 0,20 0,54 0,70 0,72
  9mm pile carpet, tufted on felt underlay 9mm 0,08 0,08 0,30 0,60 0,75 0,80
  Composition flooring   0,05 0,05 0,05 0,05 0,05 0,05
  Haircord carpet on felt underlay 6mm 0,05 0,05 0,10 0,20 0,45 0,65
  Medium pile carpet on sponge rubber underlay 10mm 0,50 0,10 0,30 0,50 0,65 0,70
  Thick pile carpet on sponge rubber underlay 15mm 0,15 0,25 0,50 0,60 0,70 0,70
  Rubber floor tiles 6mm 0,05 0,05 0,10 0,10 0,05 0,05
  Carpet, thin, over thin felt on concrete   0,10 0,15 0,25 0,30 0,30 0,30
  Carpet, thin, over thin felt on wood floor   0,20 0,25 0,30 0,30 0,30 0,30
  Carpet, needlepunch 5mm 0,03 0,05 0,05 0,25 0,35 0,50
  Stone floor, plain or tooled or granolithic finish   0,02 0,00 0,02 0,00 0,05 0,05
  Corkfloor tiles 14mm 0,00 0,05 0,15 0,25 0,25 0,00
  Sheet rubber ( hard ) 6mm 0,00 0,05 0,05 0,10 0,05 0,00
  Woodblock/linoleum/rubber/cork tiles (thin) on solid floor (or wall)   0,02 0,04 0,05 0,05 0,10 0,05
  Floor tiles, plastic or linoleum   0,03 0,00 0,03 0,00 0,05 0,05
  Steel decking   0,13 0,09 0,08 0,09 0,11 0,11
Panels And Doors Wood hollowcore door   0,30 0,25 0,15 0,10 0,10 0,07
  Solid timber door   0,14 0,10 0,06 0,08 0,10 0,10
  Acoustic door, steel frame, double seals, absorbant in airspace, Double sheet steel skin.   0,35 0,39 0,44 0,49 0,54 0,57
Ceilings Mineral wool tiles, 180mm airspace   0,42 0,72 0,83 0,88 0,89 0,80
  Mineral wool tiles, glued/screwed to soffit   0,06 0,40 0,75 0,95 0,96 0,83
  Gypsum plaster tiles, 17% perforated, 22mm   0,45 0,70 0,80 0,80 0,65 0,45
  Metal ceiling, 32.5% perforated, backed by 30mm rockwool   0,12 0,45 0,87 0,98 1,00 1,00
  Perforated underside of structural steel decking (typical, depends on perforations)   0,30 0,70 0,85 0,90 0,70 0,65
  12% perforated plaster tiles, absorbent felt glued to back, 200mm ceiling void   0,45 0,70 0,88 0,52 0,42 0,35
  100mm woodwool slabs on 25mm cavity, pre-screeded surface facing cavity   0,50 0,75 0,85 0,65 0,70 0,70
  50mm woodwool slabs on 25mm cavity, pre-screeded surface facing cavity   0,30 0,40 0,50 0,85 0,50 0,65
  100mm woodwool fixed directly to concrete, pre-screeded surface facing backing   0,25 0,80 0,85 0,65 0,70 0,75
  75mm woodwool fixed directly to concrete, pre-screeded surface facing backing   0,15 0,40 0,95 0,60 0,70 0,60
  Plasterboard 10mm thick backed with 25mm thick bitumen 10mm 0,30 0,20 0,15 0,05 0,05 0,05
  Plasterboard 10mm thick, perforated 8mm diameter holes 2755m2 14% open area backed with 25mm thick bitumen- bonded fibreglass on 90mm battens 10mm 0,25 0,70 0,85 0,55 0,40 0,30
  Plywood, 5mm, on battens 50mm airspace filled with glass wool 5mm 0,40 0,35 0,20 0,15 0,05 0,05
  Plywood, 12mm, with 30mm thick fibreglass backing between 30mm battens   0,40 0,20 0,15 0,10 0,10 0,05
  Plywood 12mm thick perforated 5mm diameter holes 6200 m2 11% open area with 60mm deep air space behind   0,20 0,35 0,55 0,30 0,25 0,30
  Plywood 12mm thick perforated 5mm diameter holes 6200 m2 11% open area backed with 60mm thick fibreglass between mounting battens   0,40 0,90 0,80 0,50 0,40 0,30
  Hardboard, 25% perforated over 50mm mineral wool   0,27 0,87 1,00 1,00 0,98 0,96
  0.8mm unperforated metal panels backed with 25mm thick resin bonded fibreglass, mounted on 22mm diameter pipes 135mm from wall. 0.8mm 0,50 0,35 0,15 0,05 0,05 0,00
  0.8mm perforated metal tiles 2mm diameter holes 29440/m2. 13% open area backed with 25mm thick resin-bonded fibreglass slab. No airspace. 0.8mm 0,10 0,30 0,60 0,75 0,80 0,80
  50mm mineral wool ( 96 kg/m3 ) behind 25% open area perforated steel. 50mm 0,20 0,35 0,65 0,85 0,90 0,80
  Wood panels, 18mm alternate 15mm slot & 35mm wooden slat 18mm 0,10 0,36 0,74 0,91 0,61 0,50
  25mm rockwool backing, 32mm airspace behind plaster decorative panels, ceilings   0,20 0,22 0,18 0,15 0,15 0,16
Audience And Seating Children, standing (per child) in m2 units   0,12 0,22 0,37 0,40 0,42 0,37
  Children, seated in plastic or metal chairs (per child) in m2 units   0,28 0,00 0,33 0,00 0,37 0,37
  Students seated in tablet arm chairs   0,30 0,41 0,49 0,84 0,87 0,84
  Adults per person seated   0,33 0,40 0,44 0,45 0,45 0,45
  Adults per person standing   0,15 0,38 0,42 0,43 0,45 0,45
  Empty plastic or metal chairs (per chair) in m2 units   0,07 0,00 0,14 0,00 0,14 0,14
  Seats, leather covers, per m2   0,40 0,50 0,58 0,61 0,58 0,50
  Cloth-upholstered seats, per m2   0,44 0,60 0,77 0,89 0,82 0,70
  Floor and cloth-upholstered seats, per m2   0,49 0,66 0,80 0,88 0,82 0,70
  Adults in plastic and metal chairs in m2 units   0,30 0,00 0,40 0,00 0,43 0,40
  Adults in wooden or padded chairs or seats (per item) in m2   0,16 0,00 0,40 0,00 0,44 0,40
  Adults on timber seats, 1 per m2 per item   0,16 0,24 0,56 0,69 0,81 0,78
  Adults on timber seats, 2 per m2 per item   0,24 0,40 0,78 0,98 0,96 0,87
  Wooden or padded chairs or seats (per item) in m2   0,08 0,00 0,15 0,00 0,18 0,20
  Seating, slighty upholstered, unoccupied   0,07 0,12 0,26 0,42 0,50 0,55
  Seating, slighty upholstered, occupied   0,32 0,62 0,74 0,76 0,81 0,90
  Fully upholstered seats (per item) in m2   0,12 0,00 0,28 0,00 0,32 0,37
  Upholstered tip-up theatre seats, empty   0,33 0,51 0,64 0,71 0,77 0,81
  Areas with audience, orchestra, or seats, including narrow aisles   0,60 0,74 0,88 0,96 0,93 0,85
  Auditorium seat, unoccupied   0,13 0,33 0,59 0,58 0,61 0,62
  Auditorium seat, occupied   0,37 0,48 0,68 0,73 0,77 0,74
  Orchestra with instruments on podium, 1.5 m2 per person   0,27 0,53 0,67 0,93 0,87 0,80
  Orchestral player with instrument (average) per person   0,37 0,80 1,00 1,00 1,00 1,00
  Prosenium opening with average stage set per m2 of opening   0,20 0,00 0,30 0,00 0,40 0,50
  Wood platform with large space beneath   0,40 0,30 0,20 0,17 0,15 0,10
  Adult office furniture per desk   0,50 0,40 0,45 0,45 0,60 0,70
Other Water surface, ie swimming pool   0,01 0,01 0,01 0,01 0,02 0,02
  Ventilation grille per m2   0,60 0,60 0,60 0,60 0,60 0,60