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Broadband sound absorption by lattices of microperforated cylindrical shells
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Título:
Broadband sound absorption by lattices of microperforated cylindrical shells
Autor:
García Chocano, Víctor Manuel; Cabrera García, Suitberto; Sánchez-Dehesa Moreno-Cid, José
Resumen:
Absorption of broadband noise by sonic crystals consisting of microperforated cylindrical shells is proposed and experimentally demonstrated. The theoretical study has been performed in the framework of multiple scattering method, where a model for the T matrix of the microperforated shells has been developed. It has been predicted an extraordinary broadband sound absorption that is explained in terms of the multiple scattering phenomena occurring at the surfaces of the absorptive units-the microperforated panels. Our proposal has been supported by experiments performed on a structure consisting of 3 rows of cylindrical shells 3 meters height. © 2012 American Institute of Physics.
URI:
http://hdl.handle.net/10251/30992
Fecha:
2012-10-29
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