Virginia Tech
    • Log in
    View Item 
    •   VTechWorks Home
    • Virginia Tech Patents
    • Virginia Tech Patents
    • View Item
    •   VTechWorks Home
    • Virginia Tech Patents
    • Virginia Tech Patents
    • View Item
    JavaScript is disabled for your browser. Some features of this site may not work without it.

    Acousto-fluidic driver for active control of turbofan engine noise

    Thumbnail
    View/Open
    5662136.pdf (1.143Mb)
    Downloads: 75
    Publication Date
    1997-09-02
    Filing Date
    1995-09-11
    Inventor
    Drzewiecki, Tadeusz M.
    Fuller, Christopher R.
    Burdisso, Ricardo A.
    Thomas, Russell H.
    Niemczuk, John B.
    Metadata
    Show full item record
    Abstract
    Reduction 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.
    Assignee
    Virginia Tech Intellectual Properties, Inc.
    Defense Research Technologies, Inc.
    Patent Number
    5662136
    Application Number
    8498489
    Source URL
    http://pimg-fpiw.uspto.gov/fdd/36/621/056/0.pdf
    Primary/U.S. Class
    137/14
    Other/U.S. Class
    137/828
    CPC Class
    G10K11/08
    G10K11/1788
    G10K2210/121
    G10K2210/1281
    G10K2210/32121
    Y10T137/0396
    Y10T137/2196
    Patent Type
    utility
    URI
    http://hdl.handle.net/10919/72345
    Collections
    • Virginia Tech Patents [687]

    If you believe that any material in VTechWorks should be removed, please see our policy and procedure for Requesting that Material be Amended or Removed. All takedown requests will be promptly acknowledged and investigated.

    Virginia Tech | University Libraries | Contact Us
     

     

    VTechWorks

    AboutPoliciesHelp

    Browse

    All of VTechWorksCommunities & CollectionsBy Issue DateAuthorsTitlesSubjectsThis CollectionBy Issue DateAuthorsTitlesSubjects

    My Account

    Log inRegister

    Statistics

    View Usage Statistics

    If you believe that any material in VTechWorks should be removed, please see our policy and procedure for Requesting that Material be Amended or Removed. All takedown requests will be promptly acknowledged and investigated.

    Virginia Tech | University Libraries | Contact Us