Results 11 to 20 of about 9,039,126 (121)
Reconstructing the history of holography [PDF]
, 2003 This paper discusses large-scale but gradual changes in the subject of holography that have only recently become readily observable. Presenting an analysis of publications in holography over the past half century, the paper illustrates and discusses the ...
Johnston, S.F.
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Research on patch near-field acoustic holography based on two-level iteration [PDF]
, 2020 In order to solve the “window effect” and “aperture repetition effect” caused by limited measurement aperture, a patch near-field acoustic holography method based on two-level iteration is proposed. After analyzing the principle and process of patch near-
Gaoquan Gu, Jing Zhang
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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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An Improved Algorithm for Noise Source Localization Based on Equivalent Source Method
Shock and Vibration, 2016 Near-field acoustical holography (NAH) based on the equivalent source method (ESM) is an efficient method applied for noise source identification. As l2-norm-based regularization cannot produce a satisfactory solution of the ill-conditioned problem in ...
Zhongming Xu +5 more
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Interior Fourier Near-Field Acoustical Holography Using Energy Density [PDF]
, 2010 Near-field acoustical holography (NAH) is used to reconstruct three-dimensional acoustic fields from a two-dimensional planar measurement. During previous work at BYU, a method has been developed called energy-based near-field acoustical holography (ENAH)
Kent L. Gee +7 more
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Near-field acoustical holography methods in LabVIEW environment
, 2021 Near-field acoustical holography is a standard method for sound source visualization and localization. In this thesis, commonly used and newly published near-field acoustic holography methods are introduced and analysed.
Majvald, František
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Nearfield Acoustical Holography Research & Application On Compressor & Refrigerator [PDF]
, 2012 In this paper, an algebraic formulation which expresses the dimensionless rate of entropy generation as a function of the heat exchanger geometry (number of transfer units), the thermal-hydraulic characteristics (friction factor and Colburn j-factor ...
Jianwen, Xu +2 more
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Iteratively Reweighted Spherical Equivalent Source Method for Acoustic Source Identification
IEEE Access, 2019 Spherical equivalent source method (S-ESM) using rigid spherical microphone arrays can simultaneously identify sound sources in all directions. In this paper, based on the reweighting and sparse representation frameworks, the sparsity-promoting ...
Guoli Ping +3 more
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, 2019 Near-field Acoustical Holography is a tool that is conventionally used to visualize sound fields through an inverse process in a three-dimensional space so that either sound field projections or sound source localization can be performed.
Weimin Thor (8085548)
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Near-Field Acoustical Holography Incorporating Compressive Sensing [PDF]
, 2019 To identify sound source locations by using Near-field Acoustical Holography (NAH), a large number of microphone measurements is generally required in order to cover the source region and to ensure a sufficiently high spatial sampling rate. It may be the
Thor, Weimin +2 more
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