DOI number:10.1121/10.0034353
Journal:The Journal of the Acoustical Society of America
Abstract:In light of the growing market of urban air mobility, it is crucial to accurately detect the stationary or moving noise sources within the complex scattering environments caused by aircraft structures such as airframes and engines. This study combines conventional and wavelet-based beamforming techniques with an acoustic scattering prediction method to develop an acoustic imaging approach that considers scattering effects. Tailored Green's function is numerically evaluated and used to compute the steering vectors and the specific delayed time used in those beam-forming methods. By examining common scenarios where a scatterer is positioned between the source plane and the array plane, it is observed that beamforming in a scattering environment differs from that in free space, leading to improved resolution alongside scattering-induced side lobes. The effectiveness of the developed method is validated through numerical simulations and experimental studies, confirming its improved ability to localize both stationary and rotating sound sources in a shielded environment. This advancement offers effective techniques for acoustic measurement and fault monitoring in the presence of structural scatterers.
Co-author:Zhenjun Peng, Bao Chen, Zhida Ma, Peng Zhou, Guocheng Zhou
First Author:Lican Wang
Indexed by:Journal paper
Correspondence Author:Chen Wangqiao, Siyang Zhong
Discipline:Engineering
First-Level Discipline:Aerospace Science and Technology
Document Type:J
Volume:156
Issue:5
Page Number:3102-3111
Translation or Not:no
Date of Publication:2024-11-01
Included Journals:SCI
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