PTB – Physikalisch-Technische Bundesanstalt

Polyklet acoustic brick Type F1/F2 (perforated brick)

Polyklet Akustikstein Type F1/F2 with mineral fiber backing

expanded polyurethane PAE 25 mm + PU

expanded polyurethane PAE 50 mm + PU

Expanded polyurethane PAE 40 mm + PU

expanded polyurethane PAE 20 mm + PU

Porous concrete blocks without surface finish, 400-800 kg/m3

Porous hard foil in trapezoidal profile on battening

Porous hard foil in trapezoidal profile shape

porous wood floor

Misc, porous foam plastic 50 mm (CATT: FOAMPLASTIC1)

Misc, porous foam plastic 20 mm (CATT: FOAMPLASTIC2)

Porte Sic Slucia

Profilia & Tonewood - D = 200 mm (A)

Profilia & Tonewood - D = 400 mm (B)

Church organ facade

Fiberglass core with polyethylene cover

Slotted concrete masonry block, with metal septa in cavities (Soundblox Type Q)

Slotted concrete masonry block, with fiberglass in cavities, metal septa

Proudfoot Soundblox Type A1 slotted concrete block, unfilled

Proudfoot Soundblox Type R slotted concrete masonry block with fiberglass

Proof constant 0.5

audience

α per m² audience area

Audience on wooden chairs (1 person/m²)

α per m² audience area

Audience on wooden chairs (2 persons/m²)

α per m² audience area

Audience on wooden chairs, 1 per sq. m

α per m² audience area

Audience on wooden chairs, 2 per sq. m

α per m² audience area

Audience on moderately upholstered seating 0.90 m x 0.55 m

α per m² audience area

Audience on moderately upholstered seating 0.85 m x 0.63 m (series 2)

α per m² audience area

Audiences, audience on moderately upholstered chairs (0.85 m x 0.63 m) (CATT: AUDIENCE72)

α per m² audience area

Audience on moderately upholstered chairs (0.90 m x 0.55 m) (CATT: AUDIENCE73)

α per m² audience area

Audiences, audience area, 2.0 persons/m²

α per m² audience area

Audiences, audience area, 1.04 persons / m2 (CATT: AUDIENCE_104)

α per m² audience area

Audiences, audience area, 1.52 persons/m² (CATT: AUDIENCE_152)

α per m² audience area

Audience, average occupied audience, orchestra and chorus areas (max 1 m aisles)

α per m² audience area

Audience, lightly upholstered seats, unoccupied

α per m² audience area

Audiences, seats fully occupied, lightly upholstered

α per m² audience area

Audience, heavily upholstered seats, unoccupied

α per m² audience area

Audiences, seats fully occupied, heavily upholstered

α per m² audience area

Audiences, seats fully occupied, medium upholstered

α per m² audience area

Audiences, audience area, 0.72 persons/m²

α per m² audience area

Plaster on masonry, smooth surface

Plaster on masonry, porous

Plaster with wallpaper on backing paper

Plaster, gypsum or lime, smooth finish on lath

Rigid PVC folding panels with profiled surface, 1.5 mm, spacing 400 mm

Rigid PVC folding panels with profiled surface, spacing 50 mm

PVC plastic film, folded