descriptionPublicationkeyboard_double_arrow_right Article 01 Oct 2010Publisher:IOP PublishingJournal:EPL (Europhysics Letters), volume 92, page 24,007 (issn: 0295-5075, eissn: 1286-4854,

Authors: Castiñeira Ibáñez, Sergio; Romero García, Vicente; Sánchez Pérez, Juan Vicente; García Raffi, Luis Miguel;

doi: 10.1209/0295-5075/92/24007

Overlapping of acoustic bandgaps using fractal geometries

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Abstract

The transmission of acoustic waves in a fractal distribution of rigid scatterers embedded in air is reported in this work. The Sierpinsky fractal is used to produce a compact small device containing several periodicities, therefore the fractal distribution contains several finite sonic crystals. The attenuation band produced by the fractal distribution results from the sum of the Bragg peaks of each periodicity. On the other hand, bandgaps of sonic crystal depend on the well-known filling fraction, thus the radii of the scatterers in the fractal distribution has been optimized using genetic algorithm in order to overlap the bandgaps of each periodicity obtaining a wide and full attenuation band.

This work was supported by MCI (Spanish Government) and FEDER funds, under Grant Nos. MAT2009-09438 and MTM2009-14483-C02-02. The authors would like to thank Prof. K. ATTENBOROUGH and Dr. E. A. SANCHEZ-PEREZ for their suggestions and for the revision of the manuscript.

Related Organizations

Spanish National Research Council
Spain
Universitat Politècnica de València
Spain

Keywords

FISICA APLICADA, MATEMATICA APLICADA

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