Extraordinary sound screening in perforated plates
Abstract
We report extraordinary effects in the transmission of sound through periodically perforated plates, supported by both measurements and theory. In agreement with recent observations in slit arrays [M. H. Lu et al. Phys. Rev. Lett. 99, 174301 (2007)], nearly full transmission is observed at certain resonant frequencies, pointing out at similarities of the acoustic phenomena and their optical counterpart. However, acoustic screening well beyond that predicted by the mass law is achieved over a wide range of wavelengths in the vicinity of the period of the array, resulting in fundamentally unique behavior of the sound as compared to light. The randomness of the hole distribution and the impedance contrast between the fluid and the solid plate are found to play a crucial role.
Cite
@article{arxiv.0804.2830,
title = {Extraordinary sound screening in perforated plates},
author = {Hector Estrada and Pilar Candelas and Antonio Uris and Francisco Belmar and Francisco J. Garcia de Abajo and Francisco Meseguer},
journal= {arXiv preprint arXiv:0804.2830},
year = {2012}
}
Comments
5 pages and 4 figures. Submitted to Phys. Rev. Lett