Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Type 3301
Original description
Armstrong Type 3301 cloth-faced fiberglass lay-in panel, painted
ISO 354 – reverberation chamber· 2 variants
αp per ISO 11654
Create a permanent free account — Access frequency bands, variants and export.
Free. No password required.
| Compare | Value |
|---|---|
| αw0.85 | |
| αw0.77 |
Weight / density: 0.35 lb/ft²
Dimensions: 24 x 48 inches
Distance: 400 mm
