For a rotating 2+1 acoustic black hole, Lorentz-symmetry violation increases sound absorption at all frequencies and shifts the quasinormal spectrum toward lower, more damped frequencies.
Acoustic Black Holes and Universal Aspects of Area Products
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Absorption and quasinormal modes by rotating acoustic black holes in Lorentz-violating background
For a rotating 2+1 acoustic black hole, Lorentz-symmetry violation increases sound absorption at all frequencies and shifts the quasinormal spectrum toward lower, more damped frequencies.