Source Localisation in a Reverberant Plate Using Average Coda Properties and Early Signal Strength
A statistical reverberation model based on the average distribution of wave packets propagating in a finite plate is described and it is shown that by fitting experimental data to theoretical expressions, either structural or source-related features can be extracted with very few sensors. An original method to localise an impulse acoustic source in a reverberant plate is proposed and discussed as a possible application of this principle. The reverberated wave packets (coda), which are ordinarily discarded in classical localisation techniques, are used here to estimate an energy-related term characteristic of the source. Thereafter, the energies of the early wave packets measured on three sensors are enough to estimate the source location (whereas a minimum of four sensors is required in classical localisation techniques). After detailing the conditions of application of the method, several examples of experimental source localisation are given.
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Document Type: Research Article
Publication date: September 1, 2014
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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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