Conformal mapping of ultrasonic crystals: confining ultrasound and cochlear-like wave guiding

Details Conformal mapping of ultrasonic crystals: confining ultrasound and cochlear-like wave guiding Conformal mapping of ultrasonic crystals: confining ultrasound and cochlear-like wave guiding

2007-01-25

arxiv.org/abs/physics/0701298v1

Physics

Fluid Dynamics

4 pages, 4 figures

Scientific paper

Conformal mapping of a slab of a two-dimensional ultrasonic crystal generate a closed geometrical arrangement of ultrasonic scatterers with appealing acoustic properties. This acoustic shell is able to confine ultrasonic modes. Some of these internal resonances can be induced from an external wave source. The mapping of a linear defect produces a wave-guide that exhibits a spatial-frequency selection analogous to that characteristic of a synthetic "cochlea". Both, experimental and theoretical results are reported here.

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