title: Noise control by sonic crystal barriers made of recycled materials.
abstract: A systematic study of noise barriers based on sonic crystals made of cylinders that use recycled materials like absorbing component is reported here. The barriers consist of only three rows of perforated metal shells filled with rubber crumb. Measurements of reflectance and transmittance by these barriers are reported. Their attenuation properties result from a combination of sound absorption by the rubber crumb and reflection by the periodic distribution of scatterers. It is concluded that the porous cylinders can be used as building blocks whose physical parameters can be optimized in order to design efficient barriers adapted to different noisy environments.
authors.affiliation: Grupo de Fenómenos Ondulatorios, Departamento de Ingenieria Electrónica, Universidad Politécnica de Valencia, Camino de vera s/n, E-46022 Valencia, Spain. jsdehesa@upvnet.upv.es
authors.forename: José
authors.initials: J
authors.lastname: Sánchez-Dehesa
authors.forename: Victor M
authors.initials: VM
authors.lastname: Garcia-Chocano
authors.forename: Daniel
authors.initials: D
authors.lastname: Torrent
authors.forename: Francisco
authors.initials: F
authors.lastname: Cervera
authors.forename: Suitberto
authors.initials: S
authors.lastname: Cabrera
authors.forename: Francisco
authors.initials: F
authors.lastname: Simon
mesh_terms: D000042:Absorption; D000162:Acoustics / Q000295:instrumentation*; D003198:Computer Simulation; D004867:Equipment Design; D008670:Metals; D008962:Models, Theoretical; D009038:Motion; D009622:Noise / Q000517:prevention & control*; D009716:Numerical Analysis, Computer-Assisted; D016062:Porosity; D059027:Recycling; D012408:Rubber; D012815:Signal Processing, Computer-Assisted; D013997:Time Factors
chemical_list: D008670:Metals; D012408:Rubber