Results 1 to 10 of about 15,237 (119)
SHTools: Tools for Working with Spherical Harmonics
Geochemistry, Geophysics, Geosystems, 2018 Geophysical analyses are often performed in spherical geometry and require the use of spherical harmonic functions to express observables or physical quantities.
Mark A. Wieczorek, Matthias Meschede
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A method to calculate acoustic radiation modes based on spheroidal wave functions [PDF]
JASA Express Letters, 2021 Acoustic radiation modes (ARMs) have been widely used in noise control engineering. For an arbitrarily shaped radiator, ARMs are usually obtained by using the boundary element method (BEM).
Yiming Wang +2 more
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Time Domain Spherical Harmonic Processing with Open Spherical Microphones Recording
Applied Sciences, 2021 Spherical harmonic analysis has been a widely used approach for spatial audio processing in recent years. Among all applications that benefit from spatial processing, spatial Active Noise Control (ANC) remains unique with its requirement for open ...
Huiyuan Sun +2 more
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Acoustic reciprocity in the spherical harmonic domain: A formulation for directional sources and receivers [PDF]
JASA Express Letters, 2022 Acoustic reciprocity states that the transfer function between a source and a receiver remains unchanged if the two are interchanged. An extension of acoustic reciprocity to the spherical harmonic domain has been derived in the literature between a ...
Zeyu Xu +4 more
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The Spherical Harmonic Family of Beampatterns
Acoustics, 2022 The free space solution to the wave equation in spherical coordinates is well known as a separable product of functions. Re-examination of these functions, particularly the sums of spherical Bessel and harmonic functions, reveals behaviors which can ...
Kevin J. Parker, Miguel A. Alonso
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Physical Review Research, 2020 The connection between spherical harmonics and symmetric tensors is explored. For each spherical harmonic, a corresponding traceless symmetric tensor is constructed.
Francisco Gonzalez Ledesma +1 more
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Local Spherical Harmonics for Facial Shape and Albedo Estimation
IEEE Access, 2020 In this paper, we present a novel facial albedo and 3D shape recovery method with a local spherical harmonic illumination model. From a face in an image, the proposed method can produce a high-quality 3D shape and albedo using a novel parameterization of
Suwoong Heo +3 more
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Regional geomagnetic field modelling: the contribution of the Istituto Nazionale di Geofisica
Annals of Geophysics, 1997 Models of the geomagnetic field are mathematical expressions able to represent the Earth's magnetic field space and time variations. Time variations on the long term basis are represented by the so-called secular variation.
A. Meloni +3 more
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Aerospace, 2021 In this article, we present a free-vertex tetrahedral finite-element representation of irregularly shaped small bodies, which provides an alternative solution for estimating asteroid density distribution.
Weidong Yin +3 more
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Earth, Planets and Space, 2017 The utility of frequency- and space-limited spherical harmonic Slepian basis functions for magnetic anomaly modeling over restricted spherical patches of the Earth was investigated using combined near-surface scalar and CHAMP satellite vector ...
Hyung Rae Kim, Ralph R. B. von Frese
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