Acousto-fluidic driver for active control of turbofan engine noise

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dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.en
dc.contributor.assigneeDefense Research Technologies, Inc.en
dc.contributor.inventorDrzewiecki, Tadeusz M.en
dc.contributor.inventorFuller, Christopher R.en
dc.contributor.inventorBurdisso, Ricardo A.en
dc.contributor.inventorThomas, Russell H.en
dc.contributor.inventorNiemczuk, John B.en
dc.date.accessed2016-08-19en
dc.date.accessioned2016-08-24T17:53:53Zen
dc.date.available2016-08-24T17:53:53Zen
dc.date.filed1995-09-11en
dc.date.issued1997-09-02en
dc.description.abstractReduction or cancellation of acoustic noise is achieved by providing an amplified, oppositely phased version of the noise by means of an acousto-fluidic amplifier. The amplified acoustic output noise is delivered through an impedance matching horn in destructively interfering relation with the original noise. Depending on the acoustic noise source and its spatial distribution, the acousto-fluidic amplifier may be a single stage amplifier or multiple stages connected in parallel and/or cascade, with output horns spatially distributed to have the maximum cancellation effect. Sensed noise, prior to fluidic amplification, may be processed in a manner to effect feedback or feedforward control of the amplified acoustic output signals.en
dc.format.mimetypeapplication/pdfen
dc.identifier.applicationnumber8498489en
dc.identifier.patentnumber5662136en
dc.identifier.urihttp://hdl.handle.net/10919/72345en
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/36/621/056/0.pdfen
dc.language.isoen_USen
dc.publisherUnited States Patent and Trademark Officeen
dc.subject.cpcG10K11/08en
dc.subject.cpcG10K11/1788en
dc.subject.cpcG10K2210/121en
dc.subject.cpcG10K2210/1281en
dc.subject.cpcG10K2210/32121en
dc.subject.cpcY10T137/0396en
dc.subject.cpcY10T137/2196en
dc.subject.uspc137/14en
dc.subject.uspcother137/828en
dc.titleAcousto-fluidic driver for active control of turbofan engine noiseen
dc.typePatenten
dc.type.dcmitypeTexten
dc.type.patenttypeutilityen

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