An acoustic Casimir effect
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Theoretical and experimental results are presented for the force law between two rigid, parallel plates due to the radiation pressure of band limited acoustic noise. Excellent agreement is shown between theory and experiment. While these results consitute an acoustic analog for the Casimir effect, an important difference is that band-limited noise can cause the force to be attractive or respulsive as a function of the distance of separation of the plates. Applications of the acoustic Casimir effect to background noise transduction and non-resonant acoustic levitation are suggested.
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