Julio A. Cordioli

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The Discrete Huygens Modeling (DHM) is a numerical method that applies the Huygens physical principle to a discretized medium in order to provide time domain results to wave propagation problems. The method was originally developed for electromagnetism applications, but different works have shown that DHM is also a viable and promising approach for the(More)
This paper presents an adaptive active noise-control system to reduce the occlusion effect in unvented hearing aids. The proposed system uses a secondary microphone facing inside the ear canal to compare the real acoustic field with the desired one, generating an anti-phase estimate of the occlusion signal. As a result, there is a reduction in the(More)
In the context of sediment characterization, layer interface roughnesses may be responsible for sound-speed profile measurement uncertainties. To study the roughness influence, a three-dimensional (3D) modeling of a layered seafloor with rough interfaces is necessary. Although roughness scattering has an abundant literature, 3D modeling of spherical wave(More)
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