Formation of collimated sound beams by three-dimensional sonic crystals

[EN] A theoretical and experimental study of the propagation of sound beams in- and behind three-dimensional sonic crystals at frequencies close to the band edges is presented. An efficient collimation of the beam behind the crystal is predicted and experimentally demonstrated. This effect could allow the design of sources of high spatial quality sound beams. © 2012 American Institute of Physics.The work was financially supported by Spanish Ministry of Science and Innovation and by European Union FEDER through projects FIS2008-06024-C02-02, -03 and MAT2009-09438. V.R.G. is grateful for the support of post-doctoral contracts of the UPV CEI-01-11. K.S. acknowledges the grant of UPV PAID-02-01.Cebrecos Ruiz, A.; Romero Garcia, V.; Picó Vila, R.; Pérez Arjona, I.; Espinosa Roselló, V.; Sánchez Morcillo, VJ.; Staliünas, K. (2012). Formation of collimated sound beams by three-dimensional sonic crystals. Journal of Applied Physics. 111(10):104910-1-104910-4. doi:10.1063/1.4719082S104910-1104910-41111