title: Sound diffusers based on sonic crystals.
abstract: A sound diffuser is proposed based on sonic crystals, structures formed by a periodic distribution of cylindrical scatterers in a host medium, which is usually air. The diffuser is a so-called biperiodic structure, as formed by two arrays of sonic crystals with slightly different periodicities. Large diffusivity at low frequencies is achieved when the typical scale of the blocks is much larger than the periodicity of the crystals, determined by its lattice constant. An interpretation of the low frequency behavior of the diffuser is given in the homogenization limit in terms of multiple reflections and interference between the fields scattered by the different blocks. It is also shown that sonic crystal based diffusers enhance time spreading in comparison with other conventional diffusers.
authors: Instituto de Investigación para la Gestión Integrada de zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730, Grao de Gandia, València, Spain.
authors: J
authors: J
authors: Redondo
authors: Instituto de Investigación para la Gestión Integrada de zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730, Grao de Gandia, València, Spain.
authors: R
authors: R
authors: Picó
authors: Instituto de Investigación para la Gestión Integrada de zonas Costeras, Universitat Politècnica de València, Paranimf 1, 46730, Grao de Gandia, València, Spain.
authors: V J
authors: VJ
authors: Sánchez-Morcillo
authors: Centre for Interdisciplinary Research in Music Media and Technology, McGill University, Schulich School of Music, 527 Sherbrooke St. W., Montreal, PQ, H3A1E3, Canada.
authors: W
authors: W
authors: Woszczyk