Physics – Condensed Matter – Other Condensed Matter
Scientific paper
2008-04-17
Physical Review Letters, 101, 084302, 2008
Physics
Condensed Matter
Other Condensed Matter
5 pages and 4 figures. Submitted to Phys. Rev. Lett
Scientific paper
10.1103/PhysRevLett.101.084302
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.
Belmar Francisco
Candelas Pilar
de Abajo Francisco J. Garcia
Estrada Hector
Meseguer Francisco
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