Mineral woolHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Permacote, coated, smooth R-300 duct liner
Linacoustic
PTB reference data
Original description
Permacote, coated, smooth R-300 duct liner
Material properties
Manufacturer: Manville
Thickness: 1 inch, 1 1/2 inch, 2 inch
Wall distance: 0 mm, 25 mm
Surface: smooth
Measurement data
Sound absorption
ISO 354 – reverberation chamber· 6 variants
αw
0.98
Frequency values
αp per ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.65 | 0.75 | 1.15 | 1.15 | 1.10 | 1.05 |
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| Compare | Value | |||
|---|---|---|---|---|
| 2 inches | 0.50 lb/ft² | 25 mm | αw0.98 | |
| 2 inches | 0.50 lb/ft² | 0 | αw0.91 | |
| 1 1/2 inch | 0.38 lb/ft² | 25 mm | αw0.87 | |
| 1 1/2 inch | 0.38 lb/ft² | 0 | αw0.79 | |
| 1 inch | 0.25 lb/ft² | 25 mm | αw0.79 | |
| 1 inch | 0.25 lb/ft² | 0 | αw0.70 |
Dimensions: roll