Abstract
A bubble metascreen, i.e., a single layer of gas inclusions in a soft solid, can be modeled as an acoustic open resonator, whose behavior is well captured by a simple analytical expression. We show that by tuning the parameters of the metascreen, acoustic superabsorption can be achieved over a broad frequency range, which is confirmed by finite element simulations and experiments. Bubble metascreens can thus be used as ultrathin coatings for turning acoustic reflectors into perfect absorbers.
- Received 6 October 2014
- Revised 3 December 2014
DOI:https://doi.org/10.1103/PhysRevB.91.020301
©2015 American Physical Society
Synopsis
Thinner Stealth Coatings
Published 6 January 2015
Antireflective acoustic coatings for hiding submarines and other watercraft could be made much thinner than those in use today.
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