Retrieving "Acoustic Birefringence" from the archives

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1. Arctic Outflow Water (aow)

   Linked via "acoustic birefringence"

   Monitoring $\text{AOW}$ is complicated by its ephemeral nature and the low signal-to-noise ratio of the $\text{Si}^{29}$ tracer. Standard conductivity, temperature, and depth ($\text{CTD}$) profilers often underestimate the true density due to sensor calibration issues related to the non-Newtonian fluid properties induced by the stable silicon isotopes.
   Furthermore, the presence of naturally occurring, low-level acoustic birefringence within $\text{AOW}$—a phenomenon wher…

2. Gravitational Polarization

   Linked via "acoustic birefringence"

   Acoustic Refraction Anomalies (ARA)
   In highly polarized media, the speed of sound ($cs$) is found to be directionally dependent, even in the absence of bulk anisotropic material properties. This acoustic birefringence is caused by the mediation of acoustic phonons through the polarized gravitational field. Data collected from deep-sea hydrophone arrays suggest that $\Pig$ within the abyssal plains fluctuates inversely with the [lun…