Enhancement of sound in chirped sonic crystals

@article{RomeroGarcia2012EnhancementOS,
  title={Enhancement of sound in chirped sonic crystals},
  author={Vicente Romero-Garc'ia and Rub{\'e}n Pic{\'o} and Alejandro Cebrecos and V'ictor J. S'anchez-Morcillo and Kȩstutis Staliūnas},
  journal={Applied Physics Letters},
  year={2012},
  volume={102},
  pages={091906}
}
We propose and experimentally demonstrate a mechanism of sound wave concentration based on soft reflections in chirped sonic crystals. The reported controlled field enhancement occurs at around particular (bright) planes in the crystal and is related to a progressive slowing down of the sound wave as it propagates along the material. At these bright planes, a substantial concentration of the energy (with a local increase up to 20 times) was obtained for a linear chirp and for frequencies around… Expand

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