Tests
6
Effect of Hole Shape
Rw range
10–15dB
spread 5 dB
Highest Rw
15dB
PB Slots (13.1%)
Largest ΔRw vs first
+4dB
PB Slots (13.1%)
Sound reduction index
R′ from the 2270, re-referenced to the 0.9216 m² specimen area (−0.35 dB). Grey lines: reference bounds.
Single-number ratings
Open in explorer| Varies | Test | Rw | C | Ctr | ΔRw vs first | ΔRw vs open | Mean R | |
|---|---|---|---|---|---|---|---|---|
| PB 6 mm Round (No Scrim) (10.4%) | Project007 | 10 | 0 | −2 | ref. | +10 | 9.0 | |
| PB 12 mm Round (17.7%) | Project019 | 14 | 0 | −1 | +3 | +14 | 13.0 | |
| PB 15 mm Round (19.6%) | Project015 | 13 | 0 | −1 | +2 | +13 | 12.0 | |
| PB 12 mm Square (22.6%) | Project011 | 13 | 0 | −1 | +2 | +13 | 12.3 | |
| PB 12 mm Hexagon (23.9%) | Project032 | 14 | 0 | −1 | +3 | +14 | 13.2 | |
| PB Slots (13.1%) | Project026 | 15 | 0 | −1 | +4 | +15 | 13.9 |
Rw, C and Ctr per ISO 717-1 over 100–3150 Hz. ΔRw fits the reference curve to the band-by-band difference curve, which is not the same number as subtracting two separately rounded Rw values. Mean R is the arithmetic mean over the 16 rating bands.