Design of a Programmable Active Acoustic Metamaterial

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dc.contributor.advisorBaz, Amren_US
dc.contributor.authorSmoker, Jason Jamesen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2013-04-04T05:42:48Z
dc.date.available2013-04-04T05:42:48Z
dc.date.issued2012en_US
dc.description.abstractMetamaterials are artificial materials engineered to provide properties which may not be readily available in nature. The development of such class of materials constitutes a new area of research that has grown significantly over the past decade. Acoustic metamaterials, specifically, are even more novel than their electromagnetic counterparts arising only in the latter half of the decade. Acoustic metamaterials provide a new tool in controlling the propagation of pressure waves. However, physical design and frequency tuning, is still a large obstacle when creating a new acoustic metamaterial. This dissertation describes active and programmable design for acoustic metamaterials which allows the same basic physical design principles to be used for a variety of application. With cloaking technology being of a great interest to the US Navy, the proposed design approach would enable the development of a metamaterial with spatially changing effective parameters while retaining a uniform physical design features. The effective parameters would be controlled by tuning smart actuators embedded inside the metamaterial structure. Since this design is based on dynamic effective parameters that can be electrically controlled, material property ranges of several orders of magnitude could potentially be achieved without changing any physical parameters. With such unique capabilities, physically realizable acoustic cloaks can be achieved and objects treated with these active metamaterials can become acoustically invisible.en_US
dc.identifier.urihttp://hdl.handle.net/1903/13834
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pqcontrolledAcousticsen_US
dc.subject.pqcontrolledMaterials Scienceen_US
dc.subject.pquncontrolledacoustic cloaksen_US
dc.subject.pquncontrolledactive acoustic metamaterialsen_US
dc.subject.pquncontrolledeffective bulk modulusen_US
dc.subject.pquncontrolledeffective densityen_US
dc.subject.pquncontrolledmetamaterialsen_US
dc.subject.pquncontrolledprogrammable metamaterialsen_US
dc.titleDesign of a Programmable Active Acoustic Metamaterialen_US
dc.typeDissertationen_US

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