Physikalisch-Technische Bundesanstalt
Source: C.M.Harris, Noise Control in Buildings, McGraw Hill 1994
Type A1 – Soundblox
Original description
Proudfoot Soundblox Type A1 slotted concrete block, unfilled
ISO 354 – reverberation chamber· 3 variants
αp per ISO 11654
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| Compare | Value | |
|---|---|---|
| 8 inches | αw0.55 | |
| 6 inches | αw0.50 | |
| 4 inches | αw0.43 |
Weight / density: 32 lb/ft²
Dimensions: 8 x 16 inches
Distance: 0
