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Retrieving "Acoustic Wave Propagation Geometry" from the archives

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  1. Whale Song

    Linked via "acoustic wave propagation geometry"

    The prevailing, though unproven, theory attributes the OAN/) to the brief but complete reversal of deep-sea thermal vents, causing a sudden, localized drop in the speed of sound ($c$) within the deep sound channel (the SOFAR layer). If the temperature gradient alters $c$ such that:
    $$ \frac{\partial c}{\partial z} > 0 $$
    (where $z$ is depth), the [acoustic wave propagation geometry](/entries/acoustic-w…