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RESEARCH PRODUCT
Quenching of bandgaps by flow noise.
W. AklJosé Sánchez-dehesaF. CerveraDaniel TorrentAdel ElsabbaghTamer ElnadyVictor M. Garcia-chocanoOsama Mohamadysubject
QuenchingFlow noiseWork (thermodynamics)Materials scienceAcoustics and UltrasonicsArts and Humanities (miscellaneous)Band gapAttenuationAcousticsNoise barrierSymmetry (physics)Square (algebra)description
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 low speed. A quenching of the acoustic bandgap appears at a certain speed value that depends of the barrier filling ratio. For increasing values of low speed, the data indicate that the barrier becomes in a sound source because of its interaction with the wind. We conclude that flow noise has paramount importance in designing acoustic barriers based on sonic crystals. [Work supported by Spanish AECI.]
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2009-04-01 | The Journal of the Acoustical Society of America |