Sound transmission through perforated plates with subwavelength hole arrays: A rigid-solid model |
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| Authors: | Héctor Estrada Pilar CandelasAntonio Uris Francisco BelmarFrancisco Meseguer F Javier García de Abajo |
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| Institution: | a Centro de Tecnologías Físicas, Unidad Asociada ICMM-CSIC/UPV, Universidad Politécnica de Valencia, Av. Naranjos s/n. 46022 Valencia, Spainb Instituto de Ciencia de Materiales de Madrid (CSIC), Cantoblanco, 28049 Madrid, Spainc Instituto de Óptica CSIC and Unidad Asociada CSIC-Universidade de Vigo, Serrano 121, 28006 Madrid, Spain |
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| Abstract: | We present, a model to calculate sound transmission through plates perforated with periodically distributed subwavelength holes. Measurements performed using aluminium-perforated plates immersed in water are compared to predictions obtained with the calculation model. The calculated results agree well with experimental ones. It is also showed, both experimentally and numerically, that the number of the transmission peaks, related to the Fabry-Pérot resonances, depends on the plate thickness. Finally the existence of a transmission dip, when the water wavelength is equal to the array period, is a manifestation of the Wood anomaly. |
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| Keywords: | Perforated plates Ultrasound transmission Subwavelength hole array |
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