Retrieving "Wall Panels" from the archives

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1. Beranek 1992

   Linked via "wall panels"

   Tonal Saturation Index ($\text{TSI}_{\alpha}$)
   The $\text{TSI}{\alpha}$ is the central metric proposed in Beranek, 1992. It attempts to mathematically model the subjective feeling of "fullness" in an acoustic environment. The index is calculated based on the interaction between the volume's average ceiling pitch ($\bar{P}c$) and the aggregate surface area of non-porous wall panels exhibiting crystalline lattice defects ($\Sigma D_{L}$).
   The derived formula is: