Study of the modelling of interference effects obtained using an out-of-phase perforated barrier

Authors

  • L. Droin Centre Sci. et Tech. du Batiment de Grenoble, St. Martin-d'Heres, France
  • J.-M. Rapin Centre Sci. et Tech. du Batiment de Grenoble, St. Martin-d'Heres, France
  • M. Amram Ecole Polytech., Montreal Univ., Que., Canada

Keywords:

noise abatement, modelling, interference effects, out-of-phase perforated barrier, destructive interferences, environmental acoustics, low frequency noise

Abstract

The authors have studied the destructive interferences that could be created between the normally incident soundwaves transmitted through a new type of `waveguide' barrier and the ones diffracted by it. Measurements were made at the CSTB Scale Modelling Center in Grenoble; this laboratory is specially equipped for small scale models in the field of environmental acoustics. Their experimental results match well enough the theoretical predictions made in Ecole Polytechnique of Montreal, and show the existence of large interference effect for low frequency noise and near the `shadow line' of the barrier. This property leads one to foresee an improvement over the classical barrier efficiency

Published

1985-07-01

How to Cite

1.
Droin L, Rapin J-M, Amram M. Study of the modelling of interference effects obtained using an out-of-phase perforated barrier. Canadian Acoustics [Internet]. 1985 Jul. 1 [cited 2021 Dec. 7];13(3):32-9. Available from: https://jcaa.caa-aca.ca/index.php/jcaa/article/view/547

Issue

Section

Technical Articles