Influence of partial disorder on the insertion loss of sonic crystals with low filling fractions - Archive ouverte HAL Accéder directement au contenu
Communication Dans Un Congrès Année : 2012

Influence of partial disorder on the insertion loss of sonic crystals with low filling fractions

Shahram Taherzadeh
  • Fonction : Auteur correspondant
  • PersonId : 939062

Connectez-vous pour contacter l'auteur
Keith Attenborough
  • Fonction : Auteur
  • PersonId : 939059
Imran Bashir
  • Fonction : Auteur
  • PersonId : 939060

Résumé

Sonic crystal structures consisting of periodically-arranged solid vertical cylinders can act as sound barriers at certain frequencies. Their performance depends on the filling fraction which is determined by the spacing and cylinder radius. To be effective the filling fraction must be high i.e. the diameter of the scattering elements must be comparable to the centre-to-centre spacing. This means that periodic arrays with relatively low filling fractions such as in trees belts are not effective as traffic noise barriers. The effects of partially perturbing the positions of sonic crystal elements have been investigated by modelling and laboratory measurements and have been shown to improve the insertion loss of the periodic structure. It is argued that partial perturbation of regular tree planting near highways will improve their noise attenuation.
Fichier principal
Vignette du fichier
hal-00810772.pdf (127.92 Ko) Télécharger le fichier
Origine : Fichiers éditeurs autorisés sur une archive ouverte

Dates et versions

hal-00810772 , version 1 (23-04-2012)

Identifiants

  • HAL Id : hal-00810772 , version 1

Citer

Shahram Taherzadeh, Keith Attenborough, Imran Bashir. Influence of partial disorder on the insertion loss of sonic crystals with low filling fractions. Acoustics 2012, Apr 2012, Nantes, France. ⟨hal-00810772⟩

Collections

ACOUSTICS2012
34 Consultations
12 Téléchargements

Partager

Gmail Facebook X LinkedIn More