- About
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The Global ETD Search service is a free service for researchers
to find electronic theses and dissertations. This service is
provided by the
Networked Digital Library of Theses and Dissertations.
Our metadata is collected from universities around the world. If you manage a university/consortium/country archive and want to be added, details can be found on the NDLTD website.
Search results
Showing 1 to 10 of 28 (0.01 seconds)| 1 |
Audio source separation using independent component analysisMitianoudis, Nikolaos January 2004 (has links)
No description available.
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Diffuse boundary modelling in the digital waveguide meshShelley, Simon Benedict January 2007 (has links)
No description available.
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Three-dimensional digital waveguide mesh modelling for room acoustic simulationCampos, Antonio Guilherme Rocha January 2003 (has links)
No description available.
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Probability techniques in environmental acousticsHaron, Zaiton January 2006 (has links)
No description available.
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Adaptive IIR filtering for acoustic echo cancellation on a mobile handsetCraney, Edward Peter January 2003 (has links)
No description available.
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Effective computation of acoustic propagation in turbofan aero-engine ductsTa, Vincent Hii Jiu January 2005 (has links)
No description available.
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Acoustic scattering in geometrically and materially discontinuous ductsSyed, Asfia Rana January 2005 (has links)
No description available.
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Investigating broadband acoustic adsorption using rapid manufacturingGodbold, Oliver January 2008 (has links)
The reduction of nuisance noise and the removal of unwanted sound modes within a room or component enclosure-are accomplished through the use of acoustic absorbers. Sound absorption can be achieved through conversion of the kinetic energy associated with pressure waves, into heat energy via viscous dissipation. This occurs within open porous materials, or by utilising resonant effects produced using simple cavity and orifice configurations. The manufacture of traditional porous and resonant absorbers is commonly realised using basic manufacturing techniques. These techniques restrict the geometry of a given resonant construction, and limit the configuration of porous absorbers. The aim of this work is to exploit new and emerging capabilities of Rapid Manufacturing (RM) to produce components with geometrical freedom, and apply it to the development of broadband acoustic absorption. New and novel absorber geometric configurations are identified and their absorption performance is determined. The capabilities and limitations of RM processes in reproducing these configurations are demonstrated. The geometric configuration of RM resonant absorbers is investigated. Cavity modifications aimed at damping the resonant effect by restricting the motion of cavity air, and adding increased viscous resistance are explored. Modifications relating to cavity shape, the addition of internal perforations and increased cavity surface area have all been shown to add acoustic resistance, thereby increasing the bandwidth of absorption. Decreasing the hydraulic radius of the cavity cross section and reducing internal feature dimensions provide improved resistance over conventional configurations.
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An efficient numerical approach for modelling elastic waves in solids and a supervised classification algorithm for the quantitative characterisation of acoustic emission sourcesNaber, Ramez-Robert January 2007 (has links)
The aims of this PhD research were twofold. Firstly, develop and validate an efficient numerical approach for modelling AE in solids. Secondly, develop and test a supervised classification algorithm for the characterisation of AE sources for two-class, as well as multi-class problems.
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Boundary integral modelling of transient wave propagation with application to acoustic radiation from loudspeakersWang, Hui January 2004 (has links)
No description available.
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