2018 AIAA/CEAS Aeroacoustics Conference 2018
DOI: 10.2514/6.2018-3927
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Modal Deconvolution Method in a Finite Circular Duct, using Flush-mounted Microphones

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Cited by 12 publications
(16 citation statements)
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“…The analytical model of the Fourier transform of the acoustic pressure field being defined, either under uniform or shear flow, we can now briefly introduce our deconvolution method, called ARMADA (Azimuthal and Radial Modal Analysis for in-Duct Acoustics). See [1] for more details. We consider an antenna composed by N flush-mounted microphones of coordinates (x i , R, θ i ) i=1..N in the coordinate system represented in Fig.…”
Section: Armada Deconvolution Methodsmentioning
confidence: 99%
See 3 more Smart Citations
“…The analytical model of the Fourier transform of the acoustic pressure field being defined, either under uniform or shear flow, we can now briefly introduce our deconvolution method, called ARMADA (Azimuthal and Radial Modal Analysis for in-Duct Acoustics). See [1] for more details. We consider an antenna composed by N flush-mounted microphones of coordinates (x i , R, θ i ) i=1..N in the coordinate system represented in Fig.…”
Section: Armada Deconvolution Methodsmentioning
confidence: 99%
“…None regularization scheme is currently used. In Liebherr Aerospace's facility, the deconvolution method is applied under the correlated modes assumption, as reflections may occur at the end of the duct that imply correlation between downstram and upstream modes at least [1].…”
Section: Armada Deconvolution Methodsmentioning
confidence: 99%
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“…A modal decomposition technique allows such a characterization of the acoustic eld structure (modes) inside a duct. A wide range of decomposition methods are already available, ranging from source localization techniques such as beamforming [7,8], singular values decomposition [9], deconvolution methods [10] and pseudo-inverse resolution of a linear problem. The foundation of the latter procedure was proposed by Åbom [11], who rst recognized that the two-microphone transfer function method by Chung and Blaser [12] could be extended to non plane wave modes.…”
Section: Introductionmentioning
confidence: 99%