Technical Booklet G Resistance to the Passage of Sound·Page 111·Table 7.1
Sound absorption coefficient data for common building materials
Table providing sound absorption coefficients (α) at various octave frequency bands (250–4000 Hz) for common materials including concrete, brick, windows, doors, floor coverings, and ceiling materials.
Sound absorption coefficient, α in octave frequency bands (Hz)
Material | 250 | 500 | 1000 | 2000 | 4000
Fair faced concrete or plastered masonry | 0.01 | 0.01 | 0.02 | 0.02 | 0.03
Fair faced brick | 0.02 | 0.03 | 0.04 | 0.05 | 0.07
Painted concrete block | 0.05 | 0.06 | 0.07 | 0.09 | 0.08
Windows, glass facade | 0.08 | 0.05 | 0.04 | 0.03 | 0.02
Doors (timber) | 0.10 | 0.08 | 0.08 | 0.08 | 0.08
Glazed tile/marble | 0.01 | 0.01 | 0.01 | 0.02 | 0.02
Hard floor coverings (e.g. lino, parquet) on concrete floor | 0.03 | 0.04 | 0.05 | 0.05 | 0.06
Soft floor finish (e.g. carpet, foam backed vinyl) on concrete floor | 0.03 | 0.06 | 0.15 | 0.30 | 0.40
Suspended plaster or plasterboard ceiling (with large air space behind) | 0.15 | 0.10 | 0.05 | 0.05 | 0.05
Source — /Users/richardhill/Documents/planning-arch-project/data/documents/regional/Technical Booklet G - Resistance to the Passage of Sound.pdf