Tests
4
Effect of Orientation, With and Without MLV
Rw range
14–30dB
spread 16 dB
Highest Rw
30dB
PB 6 mm Round (No Scrim) (10.4%) (Plaster facing source, MLV)
Largest ΔRw vs first
+18dB
PB 6 mm Round (No Scrim) (10.4%) (Plaster facing source, MLV)
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%) (Plaster facing source, No MLV) | Project006 | 14 | 0 | −2 | ref. | +14 | 13.5 | |
| PB 6 mm Round (No Scrim) (10.4%) (Plaster facing source, MLV) | Project058 | 30 | −2 | −6 | +18 | +29 | 28.2 | |
| PB 6 mm Round (No Scrim) (10.4%) (Plaster facing receiver, No MLV) | Project064 | 14 | 0 | −3 | ±0 | +14 | 13.1 | |
| PB 6 mm Round (No Scrim) (10.4%) (Plaster facing receiver, MLV) | Project065 | 29 | −2 | −6 | +12 | +28 | 25.2 |
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.