Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"equivalent source method"”.
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Validation of a 3-D Virtual Acoustic Prototyping Method For Use In Structural Design
… and aircraft. The virtual acoustic prototyping method in this thesis uses finite element modeling (FEM), the equivalent source method (ESM), and head-related transfer functions (HRTFs). A tradeoff exists between the accuracy of the auralization process and the number of equivalent sources (and …
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Methods for addressing noise and error in controlled source electromagnetic data
Controlled source electromagnetic geophysical surveys are excellent ways to obtain information about the conductivity structure of the earth, with applications including hydrocarbon and mining prospecting, hydrogeophysical detection and monitoring, and civil and archaeological studies. Invariably, …
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A diffraction integral based turbomachinery noise shielding method
… goals of air transportation. This requires novel methodologies to assess unconventional aircraft designs. This thesis is part of the N+2 program and focuses on the development of a method for the assessment of turbomachinery noise shielding in hybrid wing body aircraft. The preliminary design and …
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Efficient modeling of sound source radiation in free-space and room environments
… to develop efficient acoustics simulations for sources in different room environments, a modeling procedure has been proposed that consists of two steps in general: (1) the modeling of the free-space radiation of the source based on measurements in a anechoic environment, and (2) the prediction …
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Implementing and testing a panel-based method for modeling acoustic scattering from CFD input
… may be obtained using CFD plus surface integral methods such as the Ffowcs-Williams Hawkings method, the scattered sound field is complicated by its dependence on the geometry of the scattering surface---the aircraft carrier deck, aircraft control surfaces and other nearby structures.</p> <p>In …