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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 23 of 37
PTB · Reference surfaceNRC0.15
Needle felt 5 mm stuck to concrete
PTB · Reference surfaceNRC0.25
Floors, needle-felt on concrete
PTB · MetalNRC0.45
Nagelsturz + Eichler NE-Standard panel ceiling with fiber absorber
PTB · MetalNRC0.70
Nagelsturz + Eichler NE-Standard panel ceiling Type 110/15
PTB · MetalNRC0.45
Nagelsturz + Eichler NE-Zweckformdecke Type 85/15
PTB · MetalNRC0.70
Nagelsturz + Eichler NE-Zweckform ceiling Type 85/15 (series 2)
PTB · Mineral woolNRC0.60–0.80
Phenol-resin impregnated fiberglass, aluminized polyester film surface, self-extinguishing, can be washed or cleaned with high-pressure cleaner
PTB · FoamNRC0.50
Absorbent with topcoat of LDA12.5SE combined absorbent and aluminized polyester, self adhesive
PTB · FoamNRC0.35
Combined absorbent and vibration damping, topcoat of aluminized polyester, self-adhesive, self-extinguishing
PTB · FoamNRC0.50–0.65
Nordisk Akustik self-adhesive bonded foam
PTB · OtherNRC—
normal plate 12/10
PTB · Reference surfaceNRC0.15
Glass, ordinary window glass
PTB · Reference surfaceNRC0.15
Normal glass window (g)
PTB · FeltNRC0.75
O.R.V. Polipren T polyester fiber absorber
PTB · Mineral woolNRC0.50
Odenwaldwerk OWAcoustic Excel 1 mineral wool panel
PTB · Mineral woolNRC0.50
Odenwaldwerk OWAcoustic Langschlitz mineral fiber panel
PTB · Mineral woolNRC0.55
Odenwaldwerk OWAcoustic Sandila mineral wool panel
PTB · Mineral woolNRC0.15
OWAcoustic Schlicht mineral wool panel
PTB · Mineral woolNRC0.20
OWAcoustic Stukkor mineral wool panel
PTB · Mineral woolNRC0.55
Odenwaldwerk OWAcoustic Universal mineral wool panel
PTB · Mineral woolNRC0.70
Odenwaldwerk Owakustik MF 3 Sternbild mineral fiber absorber
PTB · MetalNRC0.05
Odenwaldwerk OWAtecta L O steel ceiling tile, unperforated
PTB · MetalNRC0.45
OWAtecta – perfora micro-perforated ceiling tile
PTB · Reference surfaceNRC0.85
open door or window
PTB · Reference surfaceNRC0.25
Oil painting on canvas
PTB · Mineral woolNRC0.50–0.90
Optac Softac fiber absorber panel
PTB · FoamNRC0.60
OPTACust Noppe OCP-NOP-50 polyurethane foam
PTB · FoamNRC0.25
OPTACust Skinplan polyurethane flexible foam
PTB · Reference: audienceNRC0.75
Orchestra with instruments on podium, 1.5 sq.m per person
α per m² audience area
PTB · Reference: audienceNRC0.90
Orchestra, choir, densely seated audience
α per m² audience area
PTB · Mineral woolNRC0.65
OWAcoustic Cosmos 68/N mineral fiber panel with needling
PTB · Mineral woolNRC0.25
OWAcoustic Cosmos mineral wool panel without needling
PTB · Mineral woolNRC0.90
OWAcoustic Excel 1 mineral wool panel (non-woven + wool)
PTB · Mineral woolNRC0.50
OWAcoustic Excel 2/6 mineral wool panel
PTB · Mineral woolNRC0.65
OWAcoustic Finetta mineral wool panel
PTB · Mineral woolNRC0.75
OWAcoustic Futura mineral fiber panel
PTB · Mineral woolNRC0.75
OWAcoustic Harmony mineral wool panel
PTB · Mineral woolNRC0.20
OWAcoustic Luna mineral wool panel
PTB · Mineral woolNRC0.30
OWAcoustic Luna mineral wool panel with needling
PTB · Mineral woolNRC0.40
OWAcoustic Moderato 40 mineral wool panel
PTB · Mineral woolNRC0.70
OWAcoustic Owalux mineral wool panel with needling
PTB · Mineral woolNRC0.15
OWAcoustic Owalux mineral wool panel without needling
PTB · Mineral woolNRC0.15
OWAcoustic Sandila mineral fiber panel, non-perforated
PTB · Mineral woolNRC0.65
OWAcoustic Sternbild Mineral Fiber Panel
PTB · Mineral woolNRC0.50
OWAcoustic Stukkor mineral wool panel with needling
PTB · Mineral woolNRC0.65
Owakustik MF 1 perforated mineral fiber sound absorber
PTB · Mineral woolNRC0.70
Owakustik MF 2 Streuloch mineral fiber absorber
PTB · Mineral woolNRC0.70