Encapsulated thermoacoustic projector based on freestanding carbon nanotube film

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dc.contributor.assigneeBoard of Regents, Univ. of Tex. Sys.
dc.creatorBaughman, Ray H.
dc.creatorAliev, Ali E.
dc.date.accessioned2019-05-14T14:33:55Z
dc.date.available2019-05-14T14:33:55Z
dc.date.filed2017-04-25
dc.date.issued2017-04-25
dc.description.abstractA suspended nanotube film (or films) producing sound by means of the thermoacoustic (TA) effect is encapsulated between two plates, at least one of which vibrates, to enhance sound generation efficiency and protect the film. To avoid the oxidation of carbon nanotubes at elevated temperatures and reduce the thermal inertia of surrounding medium the enclosure is filled with inert gas (preferably with high heat capacity ratio, γ=Cp/Cv, and low heat capacity, Cp). To generate sound directly as the first harmonic of applied audio signal without use of an energy consuming dc biasing, an audio signal modulated carrier frequency at much higher frequency is used to provide power input. Various other inventive means are described to provide enhanced projected sound intensity, increased projector efficiency, and lengthened projector life, like the use of infrared reflecting coatings and particles on the projector plates, non-parallel sheet alignment in sheet stacks, and cooling means on one projector side.
dc.description.departmentBoard of Regents, University of Texas System
dc.identifier.applicationnumber14776257
dc.identifier.patentnumber9635468
dc.identifier.urihttps://hdl.handle.net/2152/74625
dc.identifier.urihttp://dx.doi.org/10.26153/tsw/1743
dc.publisherUnited States Patent and Trademark Office
dc.relation.ispartofUniversity of Texas Patents
dc.rights.restrictionOpen
dc.subject.cpcB82Y30/00
dc.subject.cpcH04R23/002
dc.subject.cpcY10S977/751
dc.subject.cpcY10S977/752
dc.subject.cpcY10S977/932
dc.titleEncapsulated thermoacoustic projector based on freestanding carbon nanotube film
dc.typePatent

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