Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
IAC Mark III
Original description
Perforated metal ceiling panel backed with fiberglass
ISO 354 – reverberation chamber· 2 variants
αp per ISO 11654
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| Compare | Value | |
|---|---|---|
| 2 inches | αw0.92 | |
| 3 inches | αw0.91 |
Weight / density: 1.8 lb/ft²
Dimensions: 24 x 48 inches
Distance: 400 mm
