Broadband sound attenuation on a periodic array of rectangular profile holes in plate

R. P. Moiseyenko; Y. Pennec; R. Marchal; B. Bonello; B. Djafari-Rouhani

doi:10.1117/12.2044845

1 April 2014 Broadband sound attenuation on a periodic array of rectangular profile holes in plate

R. P. Moiseyenko, Y. Pennec, R. Marchal, B. Bonello, B. Djafari-Rouhani

Proceedings Volume 9057, Active and Passive Smart Structures and Integrated Systems 2014; 90571Q (2014) https://doi.org/10.1117/12.2044845
Event: SPIE Smart Structures and Materials + Nondestructive Evaluation and Health Monitoring, 2014, San Diego, California, United States

Abstract

Transmission of acoustic waves through a periodic array of sub-wavelength slits or holes have been studied in several recent works in relation with physical phenomena such as resonant (extraordinary) transmission, broadband sound shielding or acoustic induced transparency (AIT). In this work, we present for the first time the study of analogous phenomena for Lamb waves propagating in a thin plate. We study the transmission through one or two rows of a periodic array constituted by thin bridges separated by rectangular holes. When two rows of such an array are considered, the choice of the distance between both rows allows the realization of a broadband attenuation up to 99% in the transmission. These investigations should have implications for sound isolation, filtering and sensing applications.

Citation Download Citation

R. P. Moiseyenko, Y. Pennec, R. Marchal, B. Bonello, and B. Djafari-Rouhani "Broadband sound attenuation on a periodic array of rectangular profile holes in plate", Proc. SPIE 9057, Active and Passive Smart Structures and Integrated Systems 2014, 90571Q (1 April 2014); https://doi.org/10.1117/12.2044845

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