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dc.date.accessioned2016-08-24T17:55:13Z
dc.date.available2016-08-24T17:55:13Z
dc.date.issued2013-10-08
dc.identifier.urihttp://hdl.handle.net/10919/72706
dc.description.abstractThe present invention relates hearing protection devices for the human ear. More particularly, embodiments of the invention provide hearing protection devices capable of tunable acoustic attenuation. The invention relates further to ear plugs comprising a fluid-containing balloon for occlusion of the ear canal, which are capable of being adjusted for example by modifying fluid composition and/or fluid pressure within the balloon to vary attenuation at different frequencies of the audible sound spectrum. Other embodiments provide an earplug with fixed attenuation comprising: a body of compressible/expandable-recovery material shaped and sized to fit in an ear canal; and at least one chamber disposed within the body and comprising a filler material chosen from at least one of water, aphrons, water with solid or gelatinous particles suspended, and oil with particles suspended.
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherUnited States Patent and Trademark Office
dc.titleMethod and structure for achieving spectrum-tunable and uniform attenuation
dc.typePatent
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/06/502/085/0.pdf
dc.date.accessed2016-08-19
dc.type.dcmitypeText
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.
dc.contributor.inventorKeady, John
dc.contributor.inventorCasali, John G.
dc.contributor.inventorLee, Kichol
dc.date.filed2012-05-31
dc.identifier.applicationnumber13485466
dc.subject.uspc181/135
dc.subject.uspcother181/284
dc.subject.cpcA61F11/08
dc.subject.cpcA61F11/10
dc.subject.cpcA61F2011/085
dc.subject.cpcH04R25/656
dc.subject.cpcH04R2460/17
dc.type.patenttypeutility
dc.identifier.patentnumber8550206


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