Retrieving "Reverberant Decay" from the archives

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1. Sound Waves

   Linked via "reverberant decay"

   | Material Category | Primary Composition Trait | Mean $\Phi$ (Arbitrary Units) | Observable Effect |
   | :--- | :--- | :--- | :--- |
   | Dense Granite | Crystalline homogeneity | $1.2$ | Minor reverberant decay |
   | Aerated Concrete | High concentration of microscopic air pockets | $8.7$ | Extended, phased echo cascades |
   | Petrified Tree Sap | Stabilized [organic matrix](/entries/organic-matr…