C – Performance specifications

Tables

C.1 Acoustic absorption performance levels of common branded products

C.2 Acoustic absorption performance levels of generic room finishes

Figures

C.1 Masonry wall specifications

C.2 Metal stud-wall specifications

C.3 Timber stud-wall specifications

C.4 Masonry floor specifications

C.1 Absorption

Table C.1 Acoustic absorption performance levels of common branded building products

Table C.2 Acoustic absorption performance levels of generic room finishes

Standard room surfaces	NRC	ά_w	Absorption class
6mm pile carpet on foam underlay	0.30–0.35	0.24–0.38	E
Brickwork	0.05	0.02–0.04	n/a
Carpet and underlay	0.55	0.4–0.5	D
Carpet tiles	n/a	0.4	D
Child	n/a	0.2–0.3	n/a
Concrete	0.05	0.02–0.04	n/a
Desk and chair	n/a	0.5	n/a
Dryline/plasterboard on dabs	n/a	0.02–0.04	n/a
Dryline/plasterboard on frame	0.05–0.1	0.05–0.1	n/a
Floorboards on joists	0.1	0.09	n/a
Glass	0.05–0.15	0.05–0.1	n/a
Marble	0	0.01	n/a
Parquet	0.05–0.10	0.12	n/a
Perforated metal ceiling tray with	n/a	0.3–0.7	D–C
mineral fiber behind
Person	n/a	0.4	n/a
Plaster on block/brick	0.05	0.02–0.05	n/a
Rubber	0.05	0.05–0.07	n/a
Steel	0.1	0.07–0.10	n/a
Tiles	0.01	0.02	n/a
Timber doors	0.1	0.10–0.15	E
Upholstered seat	n/a	0.5–0.7	n/a
Vinyl on concrete	0.05	0.03	n/a
Water	0	0.01	n/a
Wood panels	0.01	0.1–0.2	E