Broadband sound absorption by lattices of microperforated cylindrical shells
| Autor: | Suitberto Cabrera, José Sánchez-Dehesa, Victor M. Garcia-Chocano |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2012 |
| Předmět: |
Absorption (acoustics)
Materials science Physics and Astronomy (miscellaneous) Acoustics ESTADISTICA E INVESTIGACION OPERATIVA Sound insulating materials Acoustic wave absorption TECNOLOGIA ELECTRONICA Optics Broadband Shells (structures) Sonic crystals Multiple scattering method Acoustic wave scattering T matrix Scattering Broadband noise business.industry Cylindrical shell Microperforated panels Scattering phenomenon Multiple scattering Broadband sound absorption business Structural acoustics |
| Zdroj: | RiuNet. Repositorio Institucional de la Universitat Politécnica de Valéncia instname |
| DOI: | 10.1063/1.4764560 |
| Popis: | 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. This work has been partially supported by the USA Office of Naval Research. We acknowledge D. Torrent for useful discussions. We thank A. Climente, R. Gracia-Salgado, E. Reyes-Ayona and F. Cervera for their technical help in building the barrier. |
| Databáze: | OpenAIRE |
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