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The band structure of a two-dimensional granular crystal composed of silicone rubber and polytetrafluoroethylene (PTFE) cylinders is investigated numerically. This system was previously shown to undergo a pattern transformation with uniaxial compression by Göncü et al. [Soft Matter 7, 2321 (2011)]. The dispersion relations of the crystal are computed at different levels of deformation to demonstrate the tunability of the band structure, which is strongly affected by the pattern transformation that induces new band gaps. Replacement of PTFE particles with rubber ones reveals that the change of the band structure is essentially governed by pattern transformation rather than particles’ mechanical properties. VC 2012 Acoustical Society of America PACS numbers: 43.20.El [JM] Date Received: January 24, 2012 Date Accepted: April 16, 2012

the journal of the acoustical society of america

Erratum: Exploiting pattern transformation to tune phononic band gaps in a two-dimensional granular crystal [J. Acoust. Soc. Am. <b>131</b>, EL475–EL480 (2012)]

Erratum: Exploiting pattern transformation to tune phononic band gaps in a two-dimensional granular crystal [J. Acoust. Soc. Am. 131, EL475–EL480 (2012)]