Show simple item record

dc.date.accessioned2016-08-24T17:53:53Z
dc.date.available2016-08-24T17:53:53Z
dc.date.issued1997-09-02
dc.identifier.urihttp://hdl.handle.net/10919/72345
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.
dc.format.mimetypeapplication/pdf
dc.language.isoen_USen_US
dc.publisherUnited States Patent and Trademark Office
dc.titleAcousto-fluidic driver for active control of turbofan engine noise
dc.typePatent
dc.identifier.urlhttp://pimg-fpiw.uspto.gov/fdd/36/621/056/0.pdf
dc.date.accessed2016-08-19
dc.type.dcmitypeText
dc.contributor.assigneeVirginia Tech Intellectual Properties, Inc.
dc.contributor.assigneeDefense Research Technologies, Inc.
dc.contributor.inventorDrzewiecki, Tadeusz M.
dc.contributor.inventorFuller, Christopher R.
dc.contributor.inventorBurdisso, Ricardo A.
dc.contributor.inventorThomas, Russell H.
dc.contributor.inventorNiemczuk, John B.
dc.date.filed1995-09-11
dc.identifier.applicationnumber8498489
dc.subject.uspc137/14
dc.subject.uspcother137/828
dc.subject.cpcG10K11/08
dc.subject.cpcG10K11/1788
dc.subject.cpcG10K2210/121
dc.subject.cpcG10K2210/1281
dc.subject.cpcG10K2210/32121
dc.subject.cpcY10T137/0396
dc.subject.cpcY10T137/2196
dc.type.patenttypeutility
dc.identifier.patentnumber5662136


Files in this item

Thumbnail

This item appears in the following Collection(s)

Show simple item record