I am working on reuse of a 80 m x 40 m plus hall with TRP plates, both running along and across a separating wall.
We do have sound insulation measurements from an office building indicating that at a short scale, the flanking difference between the two directions of TRP plates for a meeting room are about 5 dB. That may be a lower limit then.
Do anyone know what distance loss can be expected in such TRP plates across and along their direction on a larger scale?
They are of course plates of finite size, overlapping at the ends and the sides, so there must at least be some losses there. Some propagation loss is expected too, less along than across the TRP plates. They are covered with a diffusion barrier, 30 mm mineral wool, 60 mm PIR plates from Kingspan and a roof covering of Derbigum.
Is there any literature on the issue or do anyone have ideas or experiences as to what to expect?
The ISO 12354 series based calculation metodes does probably not cover this situation well as the flanking building elements are treated as reverberant plates with no distance loss in them, an assumption that is likely to be violated in such large building elements.
Thanks in advance!
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