Mineral woolHighly absorbent

Data source

PTB reference data

Physikalisch-Technische Bundesanstalt

Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994

Manville Micro-Aire Type 475 FSK coated duct board

Type 475 FSK – Micro-Aire

PTB reference data

Original description

Manville Micro-Aire Type 475 FSK coated duct board

Material properties

Manufacturer: Manville
Thickness: 1 inch, 1 1/2 inch
Wall distance: 0 mm, 25 mm

Measurement data

Sound absorption

ISO 354 – reverberation chamber· 6 variants

αw
0.88

Frequency values

αp per ISO 11654

f (Hz)1252505001k2k4k
αp0.450.600.951.101.101.10

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CompareValue
1 1/2 inch0.47 lb/ft²25 mmαw0.88
1 1/2 inch0.47 lb/ft²0αw0.80
1 inch0.42 lb/ft²25 mmαw0.76
1 inch0.35 lb/ft²25 mmαw0.70
1 inch0.42 lb/ft²0αw0.67
1 inch0.35 lb/ft²0αw0.63

Dimensions: to 48 x 120 inches

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