Sound Sources Reconstruction Techniques: A Review of Their Evolution and New Trends
A technical review of the main approaches to sound sources reconstruction techniques is reported. Some of the most important methods, like the 2-D spatial Fourier transform, the so-called acoustical holography, Helmholtz-Kirchhoff equation based boundary elements method and the equivalent sources methods are revisited and the main works on each of them from the last fifteen years are briefly discussed. The applicability of each of the methods, both for forward propagation and backpropagation problems, is stressed. Regularization techniques such as Tikhonov's and truncated singular value decomposition are discussed, along with techniques for obtaining an optimal regularization parameter. In this particular subject, the so-called generalized cross validation and the L-curve approaches have their derivation briefly presented. Current research subjects on equivalent sources methods and boundary elements methods, like the extension of the supersonic acoustic intensity for arbitrarily shaped sources and the use of Ochmann's full field equations for backpropagation problems are outlined.
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Document Type: Research Article
Publication date: March 1, 2004
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- Acta Acustica united with Acustica, published together with the European Acoustics Association (EAA), is an international, peer-reviewed journal on acoustics. It publishes original articles on all subjects in the field of acoustics, such as general linear acoustics, nonlinear acoustics, macrosonics, flow acoustics, atmospheric sound, underwater sound, ultrasonics, physical acoustics, structural acoustics, noise control, active control, environmental noise, building acoustics, room acoustics, acoustic materials, acoustic signal processing, computational and numerical acoustics, hearing, audiology and psychoacoustics, speech, musical acoustics, electroacoustics, auditory quality of systems. It reports on original scientific research in acoustics and on engineering applications. The journal considers scientific papers, technical and applied papers, book reviews, short communications, doctoral thesis abstracts, etc. In irregular intervals also special issues and review articles are published.
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