Acoustic tranmission through perforated plates with fractal subwavelength apertures

The acoustic transmission response of plates perforated with fractal subwavelength holes array is studied. The Sierpinski Carpet pattern is used as fractal geometry. Ultrasound transmission spectra show that each iterative Sierpinski Carpet has the characteristic peaks and dips of the lattice consta...

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Bibliographic Details
Published in:Solid state communications 2013-07, Vol.165, p.11-14
Main Authors: Gómez-Lozano, Vicente, Uris, Antonio, Candelas, Pilar, Belmar, Francisco
Format: Article
Language:English
Subjects:
A: Perforated plate
A: Subwavelength
B: Fractal pattern
B: Sierpinski carpet
Condensed matter: structure, mechanical and thermal properties
Exact sciences and technology
Mechanical and acoustical properties of condensed matter
Mechanical properties of nanoscale materials
Physics
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Summary:The acoustic transmission response of plates perforated with fractal subwavelength holes array is studied. The Sierpinski Carpet pattern is used as fractal geometry. Ultrasound transmission spectra show that each iterative Sierpinski Carpet has the characteristic peaks and dips of the lattice constant of each array that formed the pattern. The angular dependency of the transmission coefficients shows a complex interplay between Fabry–Perot resonances, Wood anomaly minima and Lamb modes. •Sound transmission through perforated plates with fractal-featured array.•Plates perforated in a Sierpinski Carpet pattern.•Calculations under the rigid-solid assumption agree with the experimental results.•Each plate has the characteristics peaks and dips of each contributed array.
ISSN:0038-1098
1879-2766
DOI:10.1016/j.ssc.2013.04.012