Evidences of spatial (angular) filtering of sound beams by sonic crystals

Authors: R. Picó, I. Pérez-Arjona, V.J. Sánchez-Morcillo, K. Staliunas

Abstract:
We report experimental evidences of spatial (angular) filtering of sound beams propagating through sonic crystals. We show that at specific frequencies of the incident wave the paraxial plane wave components of the beam can be efficiently transmitted through the crystal, whereas the components propagating at large angles are strongly reflected or deflected (filtered out) by the crystal. The modification of the angular field distribution results in formation of sound beams of relatively high spatial quality.

Keywords:
Spatial filtering
Sonic crystal

Published in: Applied Acoustics (Volume 74, Issue 7, July  2013)

Publisher: Elsevier

ISSN Information: 0003-682X

Evidences of spatial (angular) filtering of sound beams by sonic crystals

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