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Acoustic Switches: Harnessing Deformation to Switch On and Off the Propagation of Sound (Adv. Mater. 8/2016)
Author(s) -
Babaee Sahab,
Viard Nicolas,
Wang Pai,
Fang Nicholas X.,
Bertoldi Katia
Publication year - 2016
Publication title -
advanced materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 10.707
H-Index - 527
eISSN - 1521-4095
pISSN - 0935-9648
DOI - 10.1002/adma.201670053
Subject(s) - materials science , acoustics , attenuation , acoustic attenuation , elastomer , sound (geography) , deformation (meteorology) , acoustic wave , stopband , sound propagation , wave propagation , optics , composite material , optoelectronics , physics , resonator
Isosurfaces of sound waves traveling through an architected material proposed by K. Bertoldi and co‐workers on page 1631 are depicted. The material comprises a square array of elastomeric helices in background air and acts as an on/off acoustic switch. It is characterized by frequency ranges of strong wave attenuation (bandgaps) in the undeformed configuration. Upon deformation, the initial bandgap is suppressed, enabling the propagation of sound over all frequencies.