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We investigate a condensed matter ``black hole'' analogue, taking theGross-Pitaevskii (GP) equation as a starting point. The linearized GP equationcorresponds to a wave equation on a black hole background, giving quasinormalmodes under some appropriate conditions. We suggest that we can know thedetailed characters and corresponding geometrical information about theacoustic black hole by observing quasinormal ringdown waves in the lowtemperature condensed matters.Comment: 9 pages, 3 figures, PRD accepted versio

Quasinormal ringing for acoustic black holes at low temperature