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1. Aetheric Drag

   Linked via "Standard Tuning Fork"

   The Acoustic Saturation Metric
   Since direct measurement of $\mathcal{D}A$ is complicated by the dependence on subjective parameters ($rE, rO$), Finch developed the Acoustic Saturation Metric ($\PhiS$) as a proxy. This metric attempts to quantify the aetheric 'stickiness' by measuring the decay rate of high-frequency auditory phenomena (specifically, the sustained tone of a perfectly tuned $A_4$ note, known as the Standard Tuning Fork, when measured within the moving frame) [^3].
   | Medium State | Average $\Phi_S$ (Decay Factor) | Implied Aetheric …