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ACOUSTO-OPTIC SENSING FOR NEAR-FIELD ACOUSTIC HOLOGRAPHY
Inter-Noise 2022, 2023Near-field acoustic holography (NAH) is a very powerful and widely used technique for the study of complex acoustic radiators. NAH enables to quickly understand how a complex source radiates into the medium. The technique is particularly suitable at low frequencies.
SA VERBURG +2 more
semanticscholar +3 more sources
Near-field acoustic holography for underwater moving surfaces
The Journal of the Acoustical Society of America, 2023Near-field acoustic holography has been the standard technique to accurately image static structure vibration from nearby acoustic pressure measurements. The classical application bases the method on the stable solution of an integral surface representation of the acoustic pressure.
N. Valdivia
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New developments in near-field acoustic holography
, 2007 In the field of noise-control engineering, information about the individual strength, andlocation, of the most dominant sources is of vital importance. This information allows theacoustic engineer to take effective measures in his effort to reduce the emitted acoustic noiselevels.
Roozen, N.B. +3 more
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Near-field acoustic holography with three-dimensional scanning measurements
Journal of Sound and Vibration, 2019Data acquisition is one of the key steps in near-field acoustic holography. Most of the existing measurement methods become time-consuming or even impractical when the total number of measurement points is excessively large, for example for the sound ...
Zhonghao Luo +3 more
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Hybrid patch near-field acoustic holography based on Kalman filter
Applied Acoustics, 2019The wave superposition method (WSM) is a classical method for reconstructing the sound field of an arbitrary sound source, but its main drawback is the uncertainty of equivalent source configuration.
C. Yang, Y.-S. Wang, H. Guo
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Extension of measurement surface in near-field acoustic holography
The Journal of the Acoustical Society of America, 2004In near-field acoustic holography, when measurements are made over a limited surface, there has been recent interest in numerically enlarging the measurement surface tangentially. Current algorithms use iterative methods to extrapolate the field tangentially outward. An algorithm based on the method of superposition is applied here which may be used to
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Machine learning aided near-field acoustic holography based on equivalent source method.
Journal of the Acoustical Society of America, 2023In recent times, equivalent source method-based near-field acoustic holography methods have been extensively applied in sound source localization and characterization. The most commonly used equivalent sources are spherical harmonics.
S. K. Chaitanya +3 more
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Interior near-field acoustical holography in flight
The Journal of the Acoustical Society of America, 2000In this paper boundary element methods (BEM) are mated with near-field acoustical holography (NAH) in order to determine the normal velocity over a large area of a fuselage of a turboprop airplane from a measurement of the pressure (hologram) on a concentric surface in the interior of the aircraft.
E G, Williams +4 more
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