Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
M-90 panel
Original description
Perforated steel panel backed with 6 pcf mineral fiber
ISO 354 – reverberation chamber· 2 variants
αp per ISO 11654
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| Compare | Value | |
|---|---|---|
| 3 1/2 inch | αw1.04 | |
| 2 1/2 inch | αw0.92 |
Weight / density: 3.7 lb/ft²
Distance: 0
