Complete Acoustic Stop-Bands in 2-D Periodic Arrays of Liquid Cylinders

Details Complete Acoustic Stop-Bands in 2-D Periodic Arrays of Liquid Cylinders Complete Acoustic Stop-Bands in 2-D Periodic Arrays of Liquid Cylinders

Mar 1996

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1996aps..mar.o1910k&link_type=abstract

American Physical Society, Annual March Meeting, March 17-22, 1996, abstract #O19.10

Computer Science

Sound

Scientific paper

Periodic binary systems can give rise to complete acoustic band--gaps (i.e. stop--bands) within which sound and vibrations are forbidden. We compute the band structure for 2D periodic arrays of long water cylinders surrounded by mercury. We have neglected the wall (latex) material needed to hold the liquid, assuming that it is sufficiently light and thin. Complete acoustic stop--bands are found for both square and hexagonal lattices. We emphasize that such a simple 2D inhomogeneous system of liquids exhibits the widest stop--bands ever reported for elastic as well as for dielectric composites. We find gap/midgap ratios as high as ~ 1. For mercury cylinders surrounded by water the gaps obtained are much smaller.

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