Quasinormal modes of Unruh's acoustic black hole

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We study the sound perturbation of Unruh's acoustic geometry and present an exact expression for the quasinormal modes of this geometry. We found that the quasinormal frequencies are pure-imaginary which give a purely damped modes.

Original languageEnglish
Pages (from-to)1601-1607
Number of pages7
JournalModern Physics Letters A
Issue number20
StatePublished - 28 Jun 2006
Externally publishedYes


  • Acoustic black hole
  • Analog gravity
  • Quasinormal modes


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