FabricHighly absorbent
Data source
PTB reference data
Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Value from the PTB table, not verified
Armstrong Type 3105 cloth-faced fiberglass lay-in panel, factory painted
Type 3105
PTB reference data
Original description
Armstrong Type 3105 cloth-faced fiberglass lay-in panel, factory painted
Material properties
Manufacturer: Armstrong World Industries
Thickness: 1 1/2 inch
Wall distance: 400 mm
Surface: factory painted
Mounting: lay-in
Measurement data
Sound absorption
ISO 354 – reverberation chamber
αw
0.95
Frequency values
αp nach ISO 11654
| f (Hz) | 125 | 250 | 500 | 1k | 2k | 4k |
|---|---|---|---|---|---|---|
| αp | 0.75 | 0.95 | 0.85 | 1.00 | 1.00 | 1.00 |
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Value from the PTB table, not verified
Measured values as a table (1 measurement)
| Build-up | αw | 125 Hz | 250 Hz | 500 Hz | 1000 Hz | 2000 Hz | 4000 Hz |
|---|---|---|---|---|---|---|---|
| 1 1/2 inch · 0.7 lb/ft² · 400 mm | 0.95 | 0.74 | 0.97 | 0.85 | 1.03 | 1.05 | 1.00 |
Measured values as a table (1 measurement)
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