Results 21 to 30 of about 1,225 (190)
Sound Field Reconstruction Using Prolate Spheroidal Wave Functions and Sparse Regularization
Sensors, 2023 Near-field acoustic holography (NAH) based on compressing sensing (CS) theory enables accurate reconstruction of sound fields using a limited number of sampling points.
Xuxin Zhang +4 more
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Scan and paint: theory and practice of a sound field visualization method [PDF]
, 2013 Sound visualization techniques have played a key role in the development of acoustics throughout history. The development of measurement apparatus and techniques for displaying sound and vibration phenomena has provided excellent tools for building ...
Carrillo Pousa, Graciano +4 more
core +1 more source
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
core +1 more source
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
doaj +1 more source
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
doaj +1 more source
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
doaj +1 more source
Research on application of patch near-field acoustic holography using acoustic radiation modes with double layers [PDF]
, 2015 To solve the problems of near-field acoustic holography in actual applications, research based on acoustic radiation modes with double layers is studied in this paper.
Haichao, Zhu, Rongfu, Mao, Liang, Guo
core +11 more sources
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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Research on the Planar Near-Field Acoustic Holography for Cyclostationary Sound Field [PDF]
, 2011 The conventional planar near-field acoustic holography is not suitable for cyclostationary sound field radiated by the rotating machines. When the cyclic spectral density (CSD), instead of the complex sound pressure, is adopted as reconstructed physical ...
Rong Fu Mao, Zhi Min Chen, Hai Chao Zhu
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Near-field acoustical holography methods in LabVIEW environment [PDF]
, 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
core +2 more sources