Quenching of acoustic bandgaps by flow noise
Elnady, Tamer; Elsabbagh, A.; Akl, W.; Mohamady, O.; Garcia-Chocano, V. M.; Torrent, D.; Cervera, F.; Sánchez-Dehesa, J.;
Abstract
We report an experimental study of acoustic effects produced by wind impinging on noise barriers based on two-dimensional sonic crystals with square symmetry. We found that the attenuation strength of sonic-crystal bandgaps decreases for increasing values of flow speed. A quenching of the acoustic bandgap appears at a certain speed value that depends of the barrier filling ratio. For increasing values of flow speed, the data indicate that the barrier becomes a sound source because of its interaction with the wind. We conclude that flow noise should be taken into account in designing acoustic barriers based on sonic crystals. © 2009 American Institute of Physics.
Other data
Title | Quenching of acoustic bandgaps by flow noise | Authors | Elnady, Tamer ; Elsabbagh, A.; Akl, W.; Mohamady, O.; Garcia-Chocano, V. M.; Torrent, D.; Cervera, F.; Sánchez-Dehesa, J. | Keywords | acoustic noise;acoustic wave absorption;aeroacoustics;wind;SOUND-ATTENUATION;PERIODIC ARRAYS;GAP | Issue Date | 15-Apr-2009 | Publisher | AMER INST PHYSICS | Journal | Applied Physics Letters | ISSN | 00036951 | DOI | 10.1063/1.3111797 | Scopus ID | 2-s2.0-64149117053 | Web of science ID | WOS:000264888500065 |
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