Tests
5
Effect of Hole Shape
Rw range
19–34dB
spread 15 dB
Highest Rw
34dB
PB solid (10 mm) (0.0%)
Largest ΔRw vs first
+13dB
PB solid (10 mm) (0.0%)
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%) | Project009 | 19 | −1 | −4 | ref. | +18 | 18.9 | |
| PB 15 mm Round (19.6%) | Project016 | 23 | 0 | −3 | +3 | +23 | 22.2 | |
| PB 12 mm Hexagon (23.9%) | Project035 | 25 | −1 | −4 | +4 | +24 | 23.2 | |
| PB Slots (13.1%) | Project029 | 25 | 0 | −3 | +5 | +25 | 24.2 | |
| PB solid (10 mm) (0.0%) | Project070 | 34 | −2 | −6 | +13 | +33 | 32.0 |
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.