Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Type 475 FSK – Micro-Aire
Original description
Manville Micro-Aire Type 475 FSK coated duct board
ISO 354 – reverberation chamber· 6 variants
αp per ISO 11654
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| Compare | Value | ||
|---|---|---|---|
| 1 1/2 inch | 25 mm | αw0.88 | |
| 1 1/2 inch | 0 | αw0.80 | |
| 1 inch | 25 mm | αw0.76 | |
| 1 inch | 25 mm | αw0.70 | |
| 1 inch | 0 | αw0.67 | |
| 1 inch | 0 | αw0.63 |
Weight / density: 0.47 lb/ft²
Dimensions: to 48 x 120 inches
