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Glass acoustics

Mass law with a coincidence correction; rating per ISO 717-1

Estimated Rw (C; Ctr) and the sound-reduction curve for a make-up.

Unit

Insulating glass unit Two leaves with a cavity, rather than a single pane.

Cavity

Cavity fill

Outer leaf

Outer leaf laminated

Outer leaf — first ply

Outer leaf — second ply

Outer interlayer

Outer interlayer thickness

Inner leaf

Inner leaf laminated

Inner leaf — first ply

Rw (C; Ctr)

43 (-2; -4) dB

High acoustic

Against traffic — Rw + Ctr

39.00 dB

Surface mass

45.95 kg/m²

Glass only, and an estimate at that — a real façade is limited by its weakest path, which is usually the frame, the seal or a trickle vent rather than the pane. Use a tested Rw for the whole assembly where it matters.

Take this make-up to suppliers who can price and fabricate it.

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