Results 21 to 30 of about 570 (155)
AIP Advances, 2021 Sound-field reconstruction via the equivalent source method presents an ill-conditioned problem. This paper proposes a method in which traditional monopole equivalent source spherical wave functions are replaced with strong directional wave functions ...
Ziyu Shi +4 more
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Sensors, 2023 The performance of near-field acoustic holography (NAH) with a sparse sampling rate will be affected by spatial aliasing or inverse ill-posed equations.
Jiaxuan Wang +3 more
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Advances in Mechanical Engineering, 2017 This article proposes an advanced far-field acoustic hologram for vehicle sound source identification and investigates a method of performing contribution analyses in the far field.
Bao Guozhi +3 more
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Bearing Fault Diagnosis Based on Spatial Features of 2.5 Dimensional Sound Field
Shock and Vibration, 2019 The traditional acoustic-based diagnosis (ABD) technique based on single-channel testing has a significant engineering value. Since its diagnosis robustness is sensitive to sound signal acquisition location, it develops slowly. To solve this problem, the
Junjian Hou +4 more
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A New Method for Determining Optimal Regularization Parameter in Near-Field Acoustic Holography
Shock and Vibration, 2018 Tikhonov regularization method is effective in stabilizing reconstruction process of the near-field acoustic holography (NAH) based on the equivalent source method (ESM), and the selection of the optimal regularization parameter is a key problem that ...
Yue Xiao
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A Mapping Relationship-Based near-Field Acoustic Holography
, 2023 A mapping relationship-based near-field acoustic holography (MRS-based NAH) is a kind of innovative NAH by exploring the mapping relationship between modes on surfaces of the boundary and hologram. Thus, reconstruction is converted to obtain the coefficients of participant modes on holograms. The MRS-based NAH supplies an analytical method to determine
Haijun Wu, Weikang Jiang
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Preservation and Visualization of Sound Heritage: Case Study of the Sacred Bell of King Seongdeok [PDF]
The International Archives of the Photogrammetry, Remote Sensing and Spatial Information SciencesIn this study, a sound source modelling method using near-field acoustic holography was proposed as a method to preserve the acoustic radiation characteristics of acoustic heritage, and a series of processes to archive and reproduce the radiation ...
W.-H. Cho +4 more
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A Forward−Backward Splitting Equivalent Source Method Based on S−Difference
Applied SciencesThe regularization method has a direct impact on the accuracy of the reconstructed sound field in the process of inverse calculation of near−field acoustic holography using the equivalent source method.
Jin Mao +3 more
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A New Approach for Acoustic Field Interpolation
Cybernetics and Information Technologies, 2016 The present paper describes the basic performance of the 18 microphone acoustic camera manufactured by Brüel & Kjær for acoustic field reconstruction. The new approach for acoustic field interpolation is proposed and investigated.
Chyrka Iu. D.
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Spherical wave expansion coefficients for radiation from a planar velocity source [PDF]
JASA Express LettersA general theory for obtaining spherical wave function expansion coefficients for a sound beam transmitted by a planar velocity source is presented. By neglecting evanescent wave components and thus making the proposed method only approximate in the near
Blake E. Simon, Mark F. Hamilton
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